Home / 28,189.52-38,882.78-18,130.69

Finding the Fourth Proportional to 28,189.52, 38,882.78 and 18,130.69

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Solution

The fourth proportional to 28,189.52, 38,882.78 and 18,130.69 is: 25,008.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.52 : 38,882.78 = 18,130.69 : x
  2. Step 2: Convert to fraction form
    28,189.52/38,882.78 = 18,130.69/x
  3. Step 3: Cross multiply
    28,189.52x = 38,882.78 × 18,130.69
  4. Step 4: Simplify right side
    28,189.52x = 704,971,539.73
  5. Step 5: Solve for x
    x = 704,971,539.73/28,189.52
  6. Step 6: Final answer
    x = 25,008.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.