Home / 20,639.49-28,482.27-11,686.97

Finding the Fourth Proportional to 20,639.49, 28,482.27 and 11,686.97

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Solution

The fourth proportional to 20,639.49, 28,482.27 and 11,686.97 is: 16,127.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.49 : 28,482.27 = 11,686.97 : x
  2. Step 2: Convert to fraction form
    20,639.49/28,482.27 = 11,686.97/x
  3. Step 3: Cross multiply
    20,639.49x = 28,482.27 × 11,686.97
  4. Step 4: Simplify right side
    20,639.49x = 332,871,292.61
  5. Step 5: Solve for x
    x = 332,871,292.61/20,639.49
  6. Step 6: Final answer
    x = 16,127.88

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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.