Home / 7,112.65-9,815.38-3,925.97

Finding the Fourth Proportional to 7,112.65, 9,815.38 and 3,925.97

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Solution

The fourth proportional to 7,112.65, 9,815.38 and 3,925.97 is: 5,417.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.65 : 9,815.38 = 3,925.97 : x
  2. Step 2: Convert to fraction form
    7,112.65/9,815.38 = 3,925.97/x
  3. Step 3: Cross multiply
    7,112.65x = 9,815.38 × 3,925.97
  4. Step 4: Simplify right side
    7,112.65x = 38,534,887.42
  5. Step 5: Solve for x
    x = 38,534,887.42/7,112.65
  6. Step 6: Final answer
    x = 5,417.80

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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.