Home / 13,123.76-18,108.60-7,535.12

Finding the Fourth Proportional to 13,123.76, 18,108.60 and 7,535.12

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Solution

The fourth proportional to 13,123.76, 18,108.60 and 7,535.12 is: 10,397.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.76 : 18,108.60 = 7,535.12 : x
  2. Step 2: Convert to fraction form
    13,123.76/18,108.60 = 7,535.12/x
  3. Step 3: Cross multiply
    13,123.76x = 18,108.60 × 7,535.12
  4. Step 4: Simplify right side
    13,123.76x = 136,450,474.03
  5. Step 5: Solve for x
    x = 136,450,474.03/13,123.76
  6. Step 6: Final answer
    x = 10,397.21

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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.