Home / 28,189.29-42,287.40-9,213.47

Finding the Fourth Proportional to 28,189.29, 42,287.40 and 9,213.47

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Solution

The fourth proportional to 28,189.29, 42,287.40 and 9,213.47 is: 13,821.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.29 : 42,287.40 = 9,213.47 : x
  2. Step 2: Convert to fraction form
    28,189.29/42,287.40 = 9,213.47/x
  3. Step 3: Cross multiply
    28,189.29x = 42,287.40 × 9,213.47
  4. Step 4: Simplify right side
    28,189.29x = 389,613,691.28
  5. Step 5: Solve for x
    x = 389,613,691.28/28,189.29
  6. Step 6: Final answer
    x = 13,821.34

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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.