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Finding the Fourth Proportional to 29,998.80, 45,000.72 and 12,470.40

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Solution

The fourth proportional to 29,998.80, 45,000.72 and 12,470.40 is: 18,706.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,998.80 : 45,000.72 = 12,470.40 : x
  2. Step 2: Convert to fraction form
    29,998.80/45,000.72 = 12,470.40/x
  3. Step 3: Cross multiply
    29,998.80x = 45,000.72 × 12,470.40
  4. Step 4: Simplify right side
    29,998.80x = 561,176,978.69
  5. Step 5: Solve for x
    x = 561,176,978.69/29,998.80
  6. Step 6: Final answer
    x = 18,706.65

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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.