Home / 21,398.57-29,534.78-13,451.55

Finding the Fourth Proportional to 21,398.57, 29,534.78 and 13,451.55

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Solution

The fourth proportional to 21,398.57, 29,534.78 and 13,451.55 is: 18,566.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.57 : 29,534.78 = 13,451.55 : x
  2. Step 2: Convert to fraction form
    21,398.57/29,534.78 = 13,451.55/x
  3. Step 3: Cross multiply
    21,398.57x = 29,534.78 × 13,451.55
  4. Step 4: Simplify right side
    21,398.57x = 397,288,502.65
  5. Step 5: Solve for x
    x = 397,288,502.65/21,398.57
  6. Step 6: Final answer
    x = 18,566.13

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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.