Home / 12,047.12-18,070.68-5,120.72

Finding the Fourth Proportional to 12,047.12, 18,070.68 and 5,120.72

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Solution

The fourth proportional to 12,047.12, 18,070.68 and 5,120.72 is: 7,681.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,047.12 : 18,070.68 = 5,120.72 : x
  2. Step 2: Convert to fraction form
    12,047.12/18,070.68 = 5,120.72/x
  3. Step 3: Cross multiply
    12,047.12x = 18,070.68 × 5,120.72
  4. Step 4: Simplify right side
    12,047.12x = 92,534,892.49
  5. Step 5: Solve for x
    x = 92,534,892.49/12,047.12
  6. Step 6: Final answer
    x = 7,681.08

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Similar ratio
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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.