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Finding the Fourth Proportional to 28,059.66, 42,061.05 and 18,205.20

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Solution

The fourth proportional to 28,059.66, 42,061.05 and 18,205.20 is: 27,289.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,059.66 : 42,061.05 = 18,205.20 : x
  2. Step 2: Convert to fraction form
    28,059.66/42,061.05 = 18,205.20/x
  3. Step 3: Cross multiply
    28,059.66x = 42,061.05 × 18,205.20
  4. Step 4: Simplify right side
    28,059.66x = 765,729,827.46
  5. Step 5: Solve for x
    x = 765,729,827.46/28,059.66
  6. Step 6: Final answer
    x = 27,289.35

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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.