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Finding the Fourth Proportional to 15,018.10, 20,716.52 and 9,353.76

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Solution

The fourth proportional to 15,018.10, 20,716.52 and 9,353.76 is: 12,902.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018.10 : 20,716.52 = 9,353.76 : x
  2. Step 2: Convert to fraction form
    15,018.10/20,716.52 = 9,353.76/x
  3. Step 3: Cross multiply
    15,018.10x = 20,716.52 × 9,353.76
  4. Step 4: Simplify right side
    15,018.10x = 193,777,356.12
  5. Step 5: Solve for x
    x = 193,777,356.12/15,018.10
  6. Step 6: Final answer
    x = 12,902.92

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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.