Home / 21,658.59-29,881.10-13,157.24

Finding the Fourth Proportional to 21,658.59, 29,881.10 and 13,157.24

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Solution

The fourth proportional to 21,658.59, 29,881.10 and 13,157.24 is: 18,152.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.59 : 29,881.10 = 13,157.24 : x
  2. Step 2: Convert to fraction form
    21,658.59/29,881.10 = 13,157.24/x
  3. Step 3: Cross multiply
    21,658.59x = 29,881.10 × 13,157.24
  4. Step 4: Simplify right side
    21,658.59x = 393,152,687.65
  5. Step 5: Solve for x
    x = 393,152,687.65/21,658.59
  6. Step 6: Final answer
    x = 18,152.28

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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.