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Finding the Fourth Proportional to 15,105.78, 20,841.66 and 9,133.12

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Solution

The fourth proportional to 15,105.78, 20,841.66 and 9,133.12 is: 12,601.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,105.78 : 20,841.66 = 9,133.12 : x
  2. Step 2: Convert to fraction form
    15,105.78/20,841.66 = 9,133.12/x
  3. Step 3: Cross multiply
    15,105.78x = 20,841.66 × 9,133.12
  4. Step 4: Simplify right side
    15,105.78x = 190,349,381.78
  5. Step 5: Solve for x
    x = 190,349,381.78/15,105.78
  6. Step 6: Final answer
    x = 12,601.10

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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.