Home / 12,070.20-18,105.30-5,143.80

Finding the Fourth Proportional to 12,070.20, 18,105.30 and 5,143.80

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Solution

The fourth proportional to 12,070.20, 18,105.30 and 5,143.80 is: 7,715.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,070.20 : 18,105.30 = 5,143.80 : x
  2. Step 2: Convert to fraction form
    12,070.20/18,105.30 = 5,143.80/x
  3. Step 3: Cross multiply
    12,070.20x = 18,105.30 × 5,143.80
  4. Step 4: Simplify right side
    12,070.20x = 93,130,042.14
  5. Step 5: Solve for x
    x = 93,130,042.14/12,070.20
  6. Step 6: Final answer
    x = 7,715.70

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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.