Home / 21,275.87-29,360.17-11,715.68

Finding the Fourth Proportional to 21,275.87, 29,360.17 and 11,715.68

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Solution

The fourth proportional to 21,275.87, 29,360.17 and 11,715.68 is: 16,167.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.87 : 29,360.17 = 11,715.68 : x
  2. Step 2: Convert to fraction form
    21,275.87/29,360.17 = 11,715.68/x
  3. Step 3: Cross multiply
    21,275.87x = 29,360.17 × 11,715.68
  4. Step 4: Simplify right side
    21,275.87x = 343,974,327.18
  5. Step 5: Solve for x
    x = 343,974,327.18/21,275.87
  6. Step 6: Final answer
    x = 16,167.35

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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.