Home / 13,124.74-18,112.05-7,156.42

Finding the Fourth Proportional to 13,124.74, 18,112.05 and 7,156.42

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Solution

The fourth proportional to 13,124.74, 18,112.05 and 7,156.42 is: 9,875.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.74 : 18,112.05 = 7,156.42 : x
  2. Step 2: Convert to fraction form
    13,124.74/18,112.05 = 7,156.42/x
  3. Step 3: Cross multiply
    13,124.74x = 18,112.05 × 7,156.42
  4. Step 4: Simplify right side
    13,124.74x = 129,617,436.86
  5. Step 5: Solve for x
    x = 129,617,436.86/13,124.74
  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.