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Finding the Fourth Proportional to 10,080.10, 15,120.15 and 5,148.10

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Solution

The fourth proportional to 10,080.10, 15,120.15 and 5,148.10 is: 7,722.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,080.10 : 15,120.15 = 5,148.10 : x
  2. Step 2: Convert to fraction form
    10,080.10/15,120.15 = 5,148.10/x
  3. Step 3: Cross multiply
    10,080.10x = 15,120.15 × 5,148.10
  4. Step 4: Simplify right side
    10,080.10x = 77,840,044.22
  5. Step 5: Solve for x
    x = 77,840,044.22/10,080.10
  6. Step 6: Final answer
    x = 7,722.15

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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.