Home / 13,387.89-18,475.33-7,419.66

Finding the Fourth Proportional to 13,387.89, 18,475.33 and 7,419.66

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Solution

The fourth proportional to 13,387.89, 18,475.33 and 7,419.66 is: 10,239.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.89 : 18,475.33 = 7,419.66 : x
  2. Step 2: Convert to fraction form
    13,387.89/18,475.33 = 7,419.66/x
  3. Step 3: Cross multiply
    13,387.89x = 18,475.33 × 7,419.66
  4. Step 4: Simplify right side
    13,387.89x = 137,080,666.99
  5. Step 5: Solve for x
    x = 137,080,666.99/13,387.89
  6. Step 6: Final answer
    x = 10,239.15

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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.