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Finding the Fourth Proportional to 20,455.68, 30,681.88 and 7,306.68

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Solution

The fourth proportional to 20,455.68, 30,681.88 and 7,306.68 is: 10,959.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.68 : 30,681.88 = 7,306.68 : x
  2. Step 2: Convert to fraction form
    20,455.68/30,681.88 = 7,306.68/x
  3. Step 3: Cross multiply
    20,455.68x = 30,681.88 × 7,306.68
  4. Step 4: Simplify right side
    20,455.68x = 224,182,678.96
  5. Step 5: Solve for x
    x = 224,182,678.96/20,455.68
  6. Step 6: Final answer
    x = 10,959.43

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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.