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Finding the Fourth Proportional to 9,642.99, 13,375.49 and 9,387.08

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Solution

The fourth proportional to 9,642.99, 13,375.49 and 9,387.08 is: 13,020.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,642.99 : 13,375.49 = 9,387.08 : x
  2. Step 2: Convert to fraction form
    9,642.99/13,375.49 = 9,387.08/x
  3. Step 3: Cross multiply
    9,642.99x = 13,375.49 × 9,387.08
  4. Step 4: Simplify right side
    9,642.99x = 125,556,851.58
  5. Step 5: Solve for x
    x = 125,556,851.58/9,642.99
  6. Step 6: Final answer
    x = 13,020.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.