Home / 20,985.32-28,959.18-11,553.96

Finding the Fourth Proportional to 20,985.32, 28,959.18 and 11,553.96

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Solution

The fourth proportional to 20,985.32, 28,959.18 and 11,553.96 is: 15,944.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.32 : 28,959.18 = 11,553.96 : x
  2. Step 2: Convert to fraction form
    20,985.32/28,959.18 = 11,553.96/x
  3. Step 3: Cross multiply
    20,985.32x = 28,959.18 × 11,553.96
  4. Step 4: Simplify right side
    20,985.32x = 334,593,207.35
  5. Step 5: Solve for x
    x = 334,593,207.35/20,985.32
  6. Step 6: Final answer
    x = 15,944.16

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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.