Home / 20,387.76-28,108.80-13,674.48

Finding the Fourth Proportional to 20,387.76, 28,108.80 and 13,674.48

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Solution

The fourth proportional to 20,387.76, 28,108.80 and 13,674.48 is: 18,853.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.76 : 28,108.80 = 13,674.48 : x
  2. Step 2: Convert to fraction form
    20,387.76/28,108.80 = 13,674.48/x
  3. Step 3: Cross multiply
    20,387.76x = 28,108.80 × 13,674.48
  4. Step 4: Simplify right side
    20,387.76x = 384,373,223.42
  5. Step 5: Solve for x
    x = 384,373,223.42/20,387.76
  6. Step 6: Final answer
    x = 18,853.14

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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.