Home / 10,239.12-15,278.80-9,135.90

Finding the Fourth Proportional to 10,239.12, 15,278.80 and 9,135.90

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Solution

The fourth proportional to 10,239.12, 15,278.80 and 9,135.90 is: 13,632.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,239.12 : 15,278.80 = 9,135.90 : x
  2. Step 2: Convert to fraction form
    10,239.12/15,278.80 = 9,135.90/x
  3. Step 3: Cross multiply
    10,239.12x = 15,278.80 × 9,135.90
  4. Step 4: Simplify right side
    10,239.12x = 139,585,588.92
  5. Step 5: Solve for x
    x = 139,585,588.92/10,239.12
  6. Step 6: Final answer
    x = 13,632.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.