Home / 12,972.20-19,458.30-8,047.40

Finding the Fourth Proportional to 12,972.20, 19,458.30 and 8,047.40

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Solution

The fourth proportional to 12,972.20, 19,458.30 and 8,047.40 is: 12,071.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,972.20 : 19,458.30 = 8,047.40 : x
  2. Step 2: Convert to fraction form
    12,972.20/19,458.30 = 8,047.40/x
  3. Step 3: Cross multiply
    12,972.20x = 19,458.30 × 8,047.40
  4. Step 4: Simplify right side
    12,972.20x = 156,588,723.42
  5. Step 5: Solve for x
    x = 156,588,723.42/12,972.20
  6. Step 6: Final answer
    x = 12,071.10

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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.