Home / 13,575.78-20,351.13-9,417.75

Finding the Fourth Proportional to 13,575.78, 20,351.13 and 9,417.75

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Solution

The fourth proportional to 13,575.78, 20,351.13 and 9,417.75 is: 14,117.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,575.78 : 20,351.13 = 9,417.75 : x
  2. Step 2: Convert to fraction form
    13,575.78/20,351.13 = 9,417.75/x
  3. Step 3: Cross multiply
    13,575.78x = 20,351.13 × 9,417.75
  4. Step 4: Simplify right side
    13,575.78x = 191,661,854.56
  5. Step 5: Solve for x
    x = 191,661,854.56/13,575.78
  6. Step 6: Final answer
    x = 14,117.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.