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Finding the Fourth Proportional to 30,432.40, 45,655.40 and 10,711.60

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Solution

The fourth proportional to 30,432.40, 45,655.40 and 10,711.60 is: 16,069.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,432.40 : 45,655.40 = 10,711.60 : x
  2. Step 2: Convert to fraction form
    30,432.40/45,655.40 = 10,711.60/x
  3. Step 3: Cross multiply
    30,432.40x = 45,655.40 × 10,711.60
  4. Step 4: Simplify right side
    30,432.40x = 489,042,382.64
  5. Step 5: Solve for x
    x = 489,042,382.64/30,432.40
  6. Step 6: Final answer
    x = 16,069.79

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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.