Home / 8,979.12-13,471.08-3,136.20

Finding the Fourth Proportional to 8,979.12, 13,471.08 and 3,136.20

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Solution

The fourth proportional to 8,979.12, 13,471.08 and 3,136.20 is: 4,705.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.12 : 13,471.08 = 3,136.20 : x
  2. Step 2: Convert to fraction form
    8,979.12/13,471.08 = 3,136.20/x
  3. Step 3: Cross multiply
    8,979.12x = 13,471.08 × 3,136.20
  4. Step 4: Simplify right side
    8,979.12x = 42,248,001.10
  5. Step 5: Solve for x
    x = 42,248,001.10/8,979.12
  6. Step 6: Final answer
    x = 4,705.14

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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.