Home / 10,938.78-15,098.40-9,167.58

Finding the Fourth Proportional to 10,938.78, 15,098.40 and 9,167.58

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Solution

The fourth proportional to 10,938.78, 15,098.40 and 9,167.58 is: 12,653.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,938.78 : 15,098.40 = 9,167.58 : x
  2. Step 2: Convert to fraction form
    10,938.78/15,098.40 = 9,167.58/x
  3. Step 3: Cross multiply
    10,938.78x = 15,098.40 × 9,167.58
  4. Step 4: Simplify right side
    10,938.78x = 138,415,789.87
  5. Step 5: Solve for x
    x = 138,415,789.87/10,938.78
  6. Step 6: Final answer
    x = 12,653.68

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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.