Home / 15,687.24-21,508.04-15,406.58

Finding the Fourth Proportional to 15,687.24, 21,508.04 and 15,406.58

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Solution

The fourth proportional to 15,687.24, 21,508.04 and 15,406.58 is: 21,123.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.24 : 21,508.04 = 15,406.58 : x
  2. Step 2: Convert to fraction form
    15,687.24/21,508.04 = 15,406.58/x
  3. Step 3: Cross multiply
    15,687.24x = 21,508.04 × 15,406.58
  4. Step 4: Simplify right side
    15,687.24x = 331,365,338.90
  5. Step 5: Solve for x
    x = 331,365,338.90/15,687.24
  6. Step 6: Final answer
    x = 21,123.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.