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Finding the Fourth Proportional to 20,387.61, 30,594.40 and 9,295.40

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Solution

The fourth proportional to 20,387.61, 30,594.40 and 9,295.40 is: 13,949.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.61 : 30,594.40 = 9,295.40 : x
  2. Step 2: Convert to fraction form
    20,387.61/30,594.40 = 9,295.40/x
  3. Step 3: Cross multiply
    20,387.61x = 30,594.40 × 9,295.40
  4. Step 4: Simplify right side
    20,387.61x = 284,387,185.76
  5. Step 5: Solve for x
    x = 284,387,185.76/20,387.61
  6. Step 6: Final answer
    x = 13,949.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.