Home / 28,381.80-39,167.04-15,806.58

Finding the Fourth Proportional to 28,381.80, 39,167.04 and 15,806.58

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Solution

The fourth proportional to 28,381.80, 39,167.04 and 15,806.58 is: 21,813.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.80 : 39,167.04 = 15,806.58 : x
  2. Step 2: Convert to fraction form
    28,381.80/39,167.04 = 15,806.58/x
  3. Step 3: Cross multiply
    28,381.80x = 39,167.04 × 15,806.58
  4. Step 4: Simplify right side
    28,381.80x = 619,096,951.12
  5. Step 5: Solve for x
    x = 619,096,951.12/28,381.80
  6. Step 6: Final answer
    x = 21,813.17

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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.