Home / 21,532.12-29,715-13,035.80

Finding the Fourth Proportional to 21,532.12, 29,715 and 13,035.80

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Solution

The fourth proportional to 21,532.12, 29,715 and 13,035.80 is: 17,989.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,532.12 : 29,715 = 13,035.80 : x
  2. Step 2: Convert to fraction form
    21,532.12/29,715 = 13,035.80/x
  3. Step 3: Cross multiply
    21,532.12x = 29,715 × 13,035.80
  4. Step 4: Simplify right side
    21,532.12x = 387,358,797
  5. Step 5: Solve for x
    x = 387,358,797/21,532.12
  6. Step 6: Final answer
    x = 17,989.81

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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.