Home / 7,878.18-10,861.80-6,456.63

Finding the Fourth Proportional to 7,878.18, 10,861.80 and 6,456.63

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Solution

The fourth proportional to 7,878.18, 10,861.80 and 6,456.63 is: 8,901.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.18 : 10,861.80 = 6,456.63 : x
  2. Step 2: Convert to fraction form
    7,878.18/10,861.80 = 6,456.63/x
  3. Step 3: Cross multiply
    7,878.18x = 10,861.80 × 6,456.63
  4. Step 4: Simplify right side
    7,878.18x = 70,130,623.73
  5. Step 5: Solve for x
    x = 70,130,623.73/7,878.18
  6. Step 6: Final answer
    x = 8,901.88

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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.