Home / 20,826.15-28,740.50-11,394.91

Finding the Fourth Proportional to 20,826.15, 28,740.50 and 11,394.91

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Solution

The fourth proportional to 20,826.15, 28,740.50 and 11,394.91 is: 15,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.15 : 28,740.50 = 11,394.91 : x
  2. Step 2: Convert to fraction form
    20,826.15/28,740.50 = 11,394.91/x
  3. Step 3: Cross multiply
    20,826.15x = 28,740.50 × 11,394.91
  4. Step 4: Simplify right side
    20,826.15x = 327,495,353.88
  5. Step 5: Solve for x
    x = 327,495,353.88/20,826.15
  6. Step 6: Final answer
    x = 15,725.20

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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.