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Finding the Fourth Proportional to 28,812, 39,760.56 and 16,237.20

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Solution

The fourth proportional to 28,812, 39,760.56 and 16,237.20 is: 22,407.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,812 : 39,760.56 = 16,237.20 : x
  2. Step 2: Convert to fraction form
    28,812/39,760.56 = 16,237.20/x
  3. Step 3: Cross multiply
    28,812x = 39,760.56 × 16,237.20
  4. Step 4: Simplify right side
    28,812x = 645,600,164.83
  5. Step 5: Solve for x
    x = 645,600,164.83/28,812
  6. Step 6: Final answer
    x = 22,407.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.