Home / 13,124.70-18,112.10-7,156.38

Finding the Fourth Proportional to 13,124.70, 18,112.10 and 7,156.38

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Solution

The fourth proportional to 13,124.70, 18,112.10 and 7,156.38 is: 9,875.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.70 : 18,112.10 = 7,156.38 : x
  2. Step 2: Convert to fraction form
    13,124.70/18,112.10 = 7,156.38/x
  3. Step 3: Cross multiply
    13,124.70x = 18,112.10 × 7,156.38
  4. Step 4: Simplify right side
    13,124.70x = 129,617,034.42
  5. Step 5: Solve for x
    x = 129,617,034.42/13,124.70
  6. Step 6: Final answer
    x = 9,875.81

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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.