Home / 12,088.20-18,113.10-10,129.80

Finding the Fourth Proportional to 12,088.20, 18,113.10 and 10,129.80

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Solution

The fourth proportional to 12,088.20, 18,113.10 and 10,129.80 is: 15,178.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,088.20 : 18,113.10 = 10,129.80 : x
  2. Step 2: Convert to fraction form
    12,088.20/18,113.10 = 10,129.80/x
  3. Step 3: Cross multiply
    12,088.20x = 18,113.10 × 10,129.80
  4. Step 4: Simplify right side
    12,088.20x = 183,482,080.38
  5. Step 5: Solve for x
    x = 183,482,080.38/12,088.20
  6. Step 6: Final answer
    x = 15,178.61

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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.