Home / 13,135.17-18,125.78-7,471.29

Finding the Fourth Proportional to 13,135.17, 18,125.78 and 7,471.29

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Solution

The fourth proportional to 13,135.17, 18,125.78 and 7,471.29 is: 10,309.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.17 : 18,125.78 = 7,471.29 : x
  2. Step 2: Convert to fraction form
    13,135.17/18,125.78 = 7,471.29/x
  3. Step 3: Cross multiply
    13,135.17x = 18,125.78 × 7,471.29
  4. Step 4: Simplify right side
    13,135.17x = 135,422,921.50
  5. Step 5: Solve for x
    x = 135,422,921.50/13,135.17
  6. Step 6: Final answer
    x = 10,309.95

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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.