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Finding the Fourth Proportional to 20,489.93, 30,724.32 and 9,387.10

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Solution

The fourth proportional to 20,489.93, 30,724.32 and 9,387.10 is: 14,075.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.93 : 30,724.32 = 9,387.10 : x
  2. Step 2: Convert to fraction form
    20,489.93/30,724.32 = 9,387.10/x
  3. Step 3: Cross multiply
    20,489.93x = 30,724.32 × 9,387.10
  4. Step 4: Simplify right side
    20,489.93x = 288,412,222.82
  5. Step 5: Solve for x
    x = 288,412,222.82/20,489.93
  6. Step 6: Final answer
    x = 14,075.81

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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.