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Finding the Fourth Proportional to 20,187.93, 30,281.92 and 9,655.47

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Solution

The fourth proportional to 20,187.93, 30,281.92 and 9,655.47 is: 14,483.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.93 : 30,281.92 = 9,655.47 : x
  2. Step 2: Convert to fraction form
    20,187.93/30,281.92 = 9,655.47/x
  3. Step 3: Cross multiply
    20,187.93x = 30,281.92 × 9,655.47
  4. Step 4: Simplify right side
    20,187.93x = 292,386,145.96
  5. Step 5: Solve for x
    x = 292,386,145.96/20,187.93
  6. Step 6: Final answer
    x = 14,483.21

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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.