Home / 7,816.32-10,778.19-6,389.34

Finding the Fourth Proportional to 7,816.32, 10,778.19 and 6,389.34

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Solution

The fourth proportional to 7,816.32, 10,778.19 and 6,389.34 is: 8,810.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,816.32 : 10,778.19 = 6,389.34 : x
  2. Step 2: Convert to fraction form
    7,816.32/10,778.19 = 6,389.34/x
  3. Step 3: Cross multiply
    7,816.32x = 10,778.19 × 6,389.34
  4. Step 4: Simplify right side
    7,816.32x = 68,865,520.49
  5. Step 5: Solve for x
    x = 68,865,520.49/7,816.32
  6. Step 6: Final answer
    x = 8,810.48

Related Problems

Find fourth proportional to 3,908.16, 5,389.10 and 3,194.67
Half scale
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Double scale
Find fourth proportional to 7,817.32, 10,779.57 and 6,390.34
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.