Home / 21,657.20-29,887.43-12,711.16

Finding the Fourth Proportional to 21,657.20, 29,887.43 and 12,711.16

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Solution

The fourth proportional to 21,657.20, 29,887.43 and 12,711.16 is: 17,541.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,657.20 : 29,887.43 = 12,711.16 : x
  2. Step 2: Convert to fraction form
    21,657.20/29,887.43 = 12,711.16/x
  3. Step 3: Cross multiply
    21,657.20x = 29,887.43 × 12,711.16
  4. Step 4: Simplify right side
    21,657.20x = 379,903,755.28
  5. Step 5: Solve for x
    x = 379,903,755.28/21,657.20
  6. Step 6: Final answer
    x = 17,541.68

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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.