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Finding the Fourth Proportional to 7,873.76, 10,862.16 and 5,080.16

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Solution

The fourth proportional to 7,873.76, 10,862.16 and 5,080.16 is: 7,008.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,873.76 : 10,862.16 = 5,080.16 : x
  2. Step 2: Convert to fraction form
    7,873.76/10,862.16 = 5,080.16/x
  3. Step 3: Cross multiply
    7,873.76x = 10,862.16 × 5,080.16
  4. Step 4: Simplify right side
    7,873.76x = 55,181,510.75
  5. Step 5: Solve for x
    x = 55,181,510.75/7,873.76
  6. Step 6: Final answer
    x = 7,008.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.