Home / 20,637.60-28,478.37-11,686.11

Finding the Fourth Proportional to 20,637.60, 28,478.37 and 11,686.11

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Solution

The fourth proportional to 20,637.60, 28,478.37 and 11,686.11 is: 16,125.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.60 : 28,478.37 = 11,686.11 : x
  2. Step 2: Convert to fraction form
    20,637.60/28,478.37 = 11,686.11/x
  3. Step 3: Cross multiply
    20,637.60x = 28,478.37 × 11,686.11
  4. Step 4: Simplify right side
    20,637.60x = 332,801,364.44
  5. Step 5: Solve for x
    x = 332,801,364.44/20,637.60
  6. Step 6: Final answer
    x = 16,125.97

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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.