Home / 28,230.62-38,959.68-15,655.40

Finding the Fourth Proportional to 28,230.62, 38,959.68 and 15,655.40

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Solution

The fourth proportional to 28,230.62, 38,959.68 and 15,655.40 is: 21,605.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,230.62 : 38,959.68 = 15,655.40 : x
  2. Step 2: Convert to fraction form
    28,230.62/38,959.68 = 15,655.40/x
  3. Step 3: Cross multiply
    28,230.62x = 38,959.68 × 15,655.40
  4. Step 4: Simplify right side
    28,230.62x = 609,929,374.27
  5. Step 5: Solve for x
    x = 609,929,374.27/28,230.62
  6. Step 6: Final answer
    x = 21,605.24

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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.