Home / 13,123.78-18,110.27-7,155.32

Finding the Fourth Proportional to 13,123.78, 18,110.27 and 7,155.32

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Solution

The fourth proportional to 13,123.78, 18,110.27 and 7,155.32 is: 9,874.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.78 : 18,110.27 = 7,155.32 : x
  2. Step 2: Convert to fraction form
    13,123.78/18,110.27 = 7,155.32/x
  3. Step 3: Cross multiply
    13,123.78x = 18,110.27 × 7,155.32
  4. Step 4: Simplify right side
    13,123.78x = 129,584,777.14
  5. Step 5: Solve for x
    x = 129,584,777.14/13,123.78
  6. Step 6: Final answer
    x = 9,874.04

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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.