Home / 15,991.38-22,068.18-8,821.20

Finding the Fourth Proportional to 15,991.38, 22,068.18 and 8,821.20

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Solution

The fourth proportional to 15,991.38, 22,068.18 and 8,821.20 is: 12,173.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.38 : 22,068.18 = 8,821.20 : x
  2. Step 2: Convert to fraction form
    15,991.38/22,068.18 = 8,821.20/x
  3. Step 3: Cross multiply
    15,991.38x = 22,068.18 × 8,821.20
  4. Step 4: Simplify right side
    15,991.38x = 194,667,829.42
  5. Step 5: Solve for x
    x = 194,667,829.42/15,991.38
  6. Step 6: Final answer
    x = 12,173.30

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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.