Home / 12,431.60-17,155.10-7,122.74

Finding the Fourth Proportional to 12,431.60, 17,155.10 and 7,122.74

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Solution

The fourth proportional to 12,431.60, 17,155.10 and 7,122.74 is: 9,829.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.60 : 17,155.10 = 7,122.74 : x
  2. Step 2: Convert to fraction form
    12,431.60/17,155.10 = 7,122.74/x
  3. Step 3: Cross multiply
    12,431.60x = 17,155.10 × 7,122.74
  4. Step 4: Simplify right side
    12,431.60x = 122,191,316.97
  5. Step 5: Solve for x
    x = 122,191,316.97/12,431.60
  6. Step 6: Final answer
    x = 9,829.09

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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.