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Finding the Fourth Proportional to 28,000.40, 42,049.20 and 19,738.40

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Solution

The fourth proportional to 28,000.40, 42,049.20 and 19,738.40 is: 29,641.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000.40 : 42,049.20 = 19,738.40 : x
  2. Step 2: Convert to fraction form
    28,000.40/42,049.20 = 19,738.40/x
  3. Step 3: Cross multiply
    28,000.40x = 42,049.20 × 19,738.40
  4. Step 4: Simplify right side
    28,000.40x = 829,983,929.28
  5. Step 5: Solve for x
    x = 829,983,929.28/28,000.40
  6. Step 6: Final answer
    x = 29,641.86

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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.