Home / 8,439.30-12,666.72-4,282.20

Finding the Fourth Proportional to 8,439.30, 12,666.72 and 4,282.20

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Solution

The fourth proportional to 8,439.30, 12,666.72 and 4,282.20 is: 6,427.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.30 : 12,666.72 = 4,282.20 : x
  2. Step 2: Convert to fraction form
    8,439.30/12,666.72 = 4,282.20/x
  3. Step 3: Cross multiply
    8,439.30x = 12,666.72 × 4,282.20
  4. Step 4: Simplify right side
    8,439.30x = 54,241,428.38
  5. Step 5: Solve for x
    x = 54,241,428.38/8,439.30
  6. Step 6: Final answer
    x = 6,427.24

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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.