Home / 9,142.74-12,621.20-6,456.15

Finding the Fourth Proportional to 9,142.74, 12,621.20 and 6,456.15

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Solution

The fourth proportional to 9,142.74, 12,621.20 and 6,456.15 is: 8,912.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,142.74 : 12,621.20 = 6,456.15 : x
  2. Step 2: Convert to fraction form
    9,142.74/12,621.20 = 6,456.15/x
  3. Step 3: Cross multiply
    9,142.74x = 12,621.20 × 6,456.15
  4. Step 4: Simplify right side
    9,142.74x = 81,484,328.10
  5. Step 5: Solve for x
    x = 81,484,328.10/9,142.74
  6. Step 6: Final answer
    x = 8,912.46

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Half scale
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Double scale
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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.