Home / 21,286.96-29,385.05-15,158.63

Finding the Fourth Proportional to 21,286.96, 29,385.05 and 15,158.63

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Solution

The fourth proportional to 21,286.96, 29,385.05 and 15,158.63 is: 20,925.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.96 : 29,385.05 = 15,158.63 : x
  2. Step 2: Convert to fraction form
    21,286.96/29,385.05 = 15,158.63/x
  3. Step 3: Cross multiply
    21,286.96x = 29,385.05 × 15,158.63
  4. Step 4: Simplify right side
    21,286.96x = 445,437,098.15
  5. Step 5: Solve for x
    x = 445,437,098.15/21,286.96
  6. Step 6: Final answer
    x = 20,925.35

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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.