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Finding the Fourth Proportional to 28,566.70, 42,850.05 and 20,110.30

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Solution

The fourth proportional to 28,566.70, 42,850.05 and 20,110.30 is: 30,165.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,566.70 : 42,850.05 = 20,110.30 : x
  2. Step 2: Convert to fraction form
    28,566.70/42,850.05 = 20,110.30/x
  3. Step 3: Cross multiply
    28,566.70x = 42,850.05 × 20,110.30
  4. Step 4: Simplify right side
    28,566.70x = 861,727,360.52
  5. Step 5: Solve for x
    x = 861,727,360.52/28,566.70
  6. Step 6: Final answer
    x = 30,165.45

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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.