Home / 13,115.98-18,100.38-7,148.08

Finding the Fourth Proportional to 13,115.98, 18,100.38 and 7,148.08

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Solution

The fourth proportional to 13,115.98, 18,100.38 and 7,148.08 is: 9,864.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.98 : 18,100.38 = 7,148.08 : x
  2. Step 2: Convert to fraction form
    13,115.98/18,100.38 = 7,148.08/x
  3. Step 3: Cross multiply
    13,115.98x = 18,100.38 × 7,148.08
  4. Step 4: Simplify right side
    13,115.98x = 129,382,964.27
  5. Step 5: Solve for x
    x = 129,382,964.27/13,115.98
  6. Step 6: Final answer
    x = 9,864.53

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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.