Home / 9,918.78-13,687.38-5,442.36

Finding the Fourth Proportional to 9,918.78, 13,687.38 and 5,442.36

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Solution

The fourth proportional to 9,918.78, 13,687.38 and 5,442.36 is: 7,510.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.78 : 13,687.38 = 5,442.36 : x
  2. Step 2: Convert to fraction form
    9,918.78/13,687.38 = 5,442.36/x
  3. Step 3: Cross multiply
    9,918.78x = 13,687.38 × 5,442.36
  4. Step 4: Simplify right side
    9,918.78x = 74,491,649.42
  5. Step 5: Solve for x
    x = 74,491,649.42/9,918.78
  6. Step 6: Final answer
    x = 7,510.16

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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.