Home / 20,385.83-28,119.49-14,728.89

Finding the Fourth Proportional to 20,385.83, 28,119.49 and 14,728.89

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Solution

The fourth proportional to 20,385.83, 28,119.49 and 14,728.89 is: 20,316.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.83 : 28,119.49 = 14,728.89 : x
  2. Step 2: Convert to fraction form
    20,385.83/28,119.49 = 14,728.89/x
  3. Step 3: Cross multiply
    20,385.83x = 28,119.49 × 14,728.89
  4. Step 4: Simplify right side
    20,385.83x = 414,168,801.42
  5. Step 5: Solve for x
    x = 414,168,801.42/20,385.83
  6. Step 6: Final answer
    x = 20,316.51

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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.