Home / 20,385.57-28,119.15-14,728.63

Finding the Fourth Proportional to 20,385.57, 28,119.15 and 14,728.63

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Solution

The fourth proportional to 20,385.57, 28,119.15 and 14,728.63 is: 20,316.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.57 : 28,119.15 = 14,728.63 : x
  2. Step 2: Convert to fraction form
    20,385.57/28,119.15 = 14,728.63/x
  3. Step 3: Cross multiply
    20,385.57x = 28,119.15 × 14,728.63
  4. Step 4: Simplify right side
    20,385.57x = 414,156,556.26
  5. Step 5: Solve for x
    x = 414,156,556.26/20,385.57
  6. Step 6: Final answer
    x = 20,316.16

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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.