Home / 21,520.92-29,707.29-13,561.59

Finding the Fourth Proportional to 21,520.92, 29,707.29 and 13,561.59

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Solution

The fourth proportional to 21,520.92, 29,707.29 and 13,561.59 is: 18,720.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.92 : 29,707.29 = 13,561.59 : x
  2. Step 2: Convert to fraction form
    21,520.92/29,707.29 = 13,561.59/x
  3. Step 3: Cross multiply
    21,520.92x = 29,707.29 × 13,561.59
  4. Step 4: Simplify right side
    21,520.92x = 402,878,086.99
  5. Step 5: Solve for x
    x = 402,878,086.99/21,520.92
  6. Step 6: Final answer
    x = 18,720.30

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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.