Home / 20,401.65-28,154.49-11,448.72

Finding the Fourth Proportional to 20,401.65, 28,154.49 and 11,448.72

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Solution

The fourth proportional to 20,401.65, 28,154.49 and 11,448.72 is: 15,799.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401.65 : 28,154.49 = 11,448.72 : x
  2. Step 2: Convert to fraction form
    20,401.65/28,154.49 = 11,448.72/x
  3. Step 3: Cross multiply
    20,401.65x = 28,154.49 × 11,448.72
  4. Step 4: Simplify right side
    20,401.65x = 322,332,872.75
  5. Step 5: Solve for x
    x = 322,332,872.75/20,401.65
  6. Step 6: Final answer
    x = 15,799.35

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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.