Home / 20,512.31-28,307.48-12,019.86

Finding the Fourth Proportional to 20,512.31, 28,307.48 and 12,019.86

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Solution

The fourth proportional to 20,512.31, 28,307.48 and 12,019.86 is: 16,587.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.31 : 28,307.48 = 12,019.86 : x
  2. Step 2: Convert to fraction form
    20,512.31/28,307.48 = 12,019.86/x
  3. Step 3: Cross multiply
    20,512.31x = 28,307.48 × 12,019.86
  4. Step 4: Simplify right side
    20,512.31x = 340,251,886.45
  5. Step 5: Solve for x
    x = 340,251,886.45/20,512.31
  6. Step 6: Final answer
    x = 16,587.70

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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.