Home / 15,753.86-21,720.15-12,910.76

Finding the Fourth Proportional to 15,753.86, 21,720.15 and 12,910.76

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Solution

The fourth proportional to 15,753.86, 21,720.15 and 12,910.76 is: 17,800.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,753.86 : 21,720.15 = 12,910.76 : x
  2. Step 2: Convert to fraction form
    15,753.86/21,720.15 = 12,910.76/x
  3. Step 3: Cross multiply
    15,753.86x = 21,720.15 × 12,910.76
  4. Step 4: Simplify right side
    15,753.86x = 280,423,643.81
  5. Step 5: Solve for x
    x = 280,423,643.81/15,753.86
  6. Step 6: Final answer
    x = 17,800.31

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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.