Home / 28,381.18-39,159.13-18,689.63

Finding the Fourth Proportional to 28,381.18, 39,159.13 and 18,689.63

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Solution

The fourth proportional to 28,381.18, 39,159.13 and 18,689.63 is: 25,787.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.18 : 39,159.13 = 18,689.63 : x
  2. Step 2: Convert to fraction form
    28,381.18/39,159.13 = 18,689.63/x
  3. Step 3: Cross multiply
    28,381.18x = 39,159.13 × 18,689.63
  4. Step 4: Simplify right side
    28,381.18x = 731,869,702.00
  5. Step 5: Solve for x
    x = 731,869,702.00/28,381.18
  6. Step 6: Final answer
    x = 25,787.15

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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.