Home / 20,639.22-28,482.45-11,686.48

Finding the Fourth Proportional to 20,639.22, 28,482.45 and 11,686.48

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Solution

The fourth proportional to 20,639.22, 28,482.45 and 11,686.48 is: 16,127.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.22 : 28,482.45 = 11,686.48 : x
  2. Step 2: Convert to fraction form
    20,639.22/28,482.45 = 11,686.48/x
  3. Step 3: Cross multiply
    20,639.22x = 28,482.45 × 11,686.48
  4. Step 4: Simplify right side
    20,639.22x = 332,859,582.28
  5. Step 5: Solve for x
    x = 332,859,582.28/20,639.22
  6. Step 6: Final answer
    x = 16,127.53

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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.