Home / 15,279.85-22,815.24-13,688.30

Finding the Fourth Proportional to 15,279.85, 22,815.24 and 13,688.30

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Solution

The fourth proportional to 15,279.85, 22,815.24 and 13,688.30 is: 20,438.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.85 : 22,815.24 = 13,688.30 : x
  2. Step 2: Convert to fraction form
    15,279.85/22,815.24 = 13,688.30/x
  3. Step 3: Cross multiply
    15,279.85x = 22,815.24 × 13,688.30
  4. Step 4: Simplify right side
    15,279.85x = 312,301,849.69
  5. Step 5: Solve for x
    x = 312,301,849.69/15,279.85
  6. Step 6: Final answer
    x = 20,438.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.