Home / 9,121.24-12,585.76-5,087.20

Finding the Fourth Proportional to 9,121.24, 12,585.76 and 5,087.20

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Solution

The fourth proportional to 9,121.24, 12,585.76 and 5,087.20 is: 7,019.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.24 : 12,585.76 = 5,087.20 : x
  2. Step 2: Convert to fraction form
    9,121.24/12,585.76 = 5,087.20/x
  3. Step 3: Cross multiply
    9,121.24x = 12,585.76 × 5,087.20
  4. Step 4: Simplify right side
    9,121.24x = 64,026,278.27
  5. Step 5: Solve for x
    x = 64,026,278.27/9,121.24
  6. Step 6: Final answer
    x = 7,019.47

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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.