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Finding the Fourth Proportional to 28,602.66, 42,902.28 and 16,989.78

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Solution

The fourth proportional to 28,602.66, 42,902.28 and 16,989.78 is: 25,483.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,602.66 : 42,902.28 = 16,989.78 : x
  2. Step 2: Convert to fraction form
    28,602.66/42,902.28 = 16,989.78/x
  3. Step 3: Cross multiply
    28,602.66x = 42,902.28 × 16,989.78
  4. Step 4: Simplify right side
    28,602.66x = 728,900,298.70
  5. Step 5: Solve for x
    x = 728,900,298.70/28,602.66
  6. Step 6: Final answer
    x = 25,483.65

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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.