Home / 20,398.20-28,144.72-11,895.24

Finding the Fourth Proportional to 20,398.20, 28,144.72 and 11,895.24

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Solution

The fourth proportional to 20,398.20, 28,144.72 and 11,895.24 is: 16,412.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.20 : 28,144.72 = 11,895.24 : x
  2. Step 2: Convert to fraction form
    20,398.20/28,144.72 = 11,895.24/x
  3. Step 3: Cross multiply
    20,398.20x = 28,144.72 × 11,895.24
  4. Step 4: Simplify right side
    20,398.20x = 334,788,199.13
  5. Step 5: Solve for x
    x = 334,788,199.13/20,398.20
  6. Step 6: Final answer
    x = 16,412.63

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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.