Home / 13,129.95-18,118.60-7,463.90

Finding the Fourth Proportional to 13,129.95, 18,118.60 and 7,463.90

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Solution

The fourth proportional to 13,129.95, 18,118.60 and 7,463.90 is: 10,299.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.95 : 18,118.60 = 7,463.90 : x
  2. Step 2: Convert to fraction form
    13,129.95/18,118.60 = 7,463.90/x
  3. Step 3: Cross multiply
    13,129.95x = 18,118.60 × 7,463.90
  4. Step 4: Simplify right side
    13,129.95x = 135,235,418.54
  5. Step 5: Solve for x
    x = 135,235,418.54/13,129.95
  6. Step 6: Final answer
    x = 10,299.77

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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.