Home / 7,129.20-9,839.64-5,036.40

Finding the Fourth Proportional to 7,129.20, 9,839.64 and 5,036.40

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Solution

The fourth proportional to 7,129.20, 9,839.64 and 5,036.40 is: 6,951.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.20 : 9,839.64 = 5,036.40 : x
  2. Step 2: Convert to fraction form
    7,129.20/9,839.64 = 5,036.40/x
  3. Step 3: Cross multiply
    7,129.20x = 9,839.64 × 5,036.40
  4. Step 4: Simplify right side
    7,129.20x = 49,556,362.90
  5. Step 5: Solve for x
    x = 49,556,362.90/7,129.20
  6. Step 6: Final answer
    x = 6,951.18

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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.