Home / 20,459.12-28,238.32-11,965.20

Finding the Fourth Proportional to 20,459.12, 28,238.32 and 11,965.20

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Solution

The fourth proportional to 20,459.12, 28,238.32 and 11,965.20 is: 16,514.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,459.12 : 28,238.32 = 11,965.20 : x
  2. Step 2: Convert to fraction form
    20,459.12/28,238.32 = 11,965.20/x
  3. Step 3: Cross multiply
    20,459.12x = 28,238.32 × 11,965.20
  4. Step 4: Simplify right side
    20,459.12x = 337,877,146.46
  5. Step 5: Solve for x
    x = 337,877,146.46/20,459.12
  6. Step 6: Final answer
    x = 16,514.74

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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.