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Finding the Fourth Proportional to 22,307.15, 30,789.25 and 15,149.01

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Solution

The fourth proportional to 22,307.15, 30,789.25 and 15,149.01 is: 20,909.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,307.15 : 30,789.25 = 15,149.01 : x
  2. Step 2: Convert to fraction form
    22,307.15/30,789.25 = 15,149.01/x
  3. Step 3: Cross multiply
    22,307.15x = 30,789.25 × 15,149.01
  4. Step 4: Simplify right side
    22,307.15x = 466,426,656.14
  5. Step 5: Solve for x
    x = 466,426,656.14/22,307.15
  6. Step 6: Final answer
    x = 20,909.29

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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.