Home / 13,125.71-18,113.13-7,157.49

Finding the Fourth Proportional to 13,125.71, 18,113.13 and 7,157.49

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Solution

The fourth proportional to 13,125.71, 18,113.13 and 7,157.49 is: 9,877.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.71 : 18,113.13 = 7,157.49 : x
  2. Step 2: Convert to fraction form
    13,125.71/18,113.13 = 7,157.49/x
  3. Step 3: Cross multiply
    13,125.71x = 18,113.13 × 7,157.49
  4. Step 4: Simplify right side
    13,125.71x = 129,644,546.84
  5. Step 5: Solve for x
    x = 129,644,546.84/13,125.71
  6. Step 6: Final answer
    x = 9,877.15

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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.