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Finding the Fourth Proportional to 28,507.20, 42,770.02 and 13,714.20

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Solution

The fourth proportional to 28,507.20, 42,770.02 and 13,714.20 is: 20,575.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,507.20 : 42,770.02 = 13,714.20 : x
  2. Step 2: Convert to fraction form
    28,507.20/42,770.02 = 13,714.20/x
  3. Step 3: Cross multiply
    28,507.20x = 42,770.02 × 13,714.20
  4. Step 4: Simplify right side
    28,507.20x = 586,556,608.28
  5. Step 5: Solve for x
    x = 586,556,608.28/28,507.20
  6. Step 6: Final answer
    x = 20,575.74

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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.