Home / 28,685.88-43,034.16-12,890.52

Finding the Fourth Proportional to 28,685.88, 43,034.16 and 12,890.52

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Solution

The fourth proportional to 28,685.88, 43,034.16 and 12,890.52 is: 19,338.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,685.88 : 43,034.16 = 12,890.52 : x
  2. Step 2: Convert to fraction form
    28,685.88/43,034.16 = 12,890.52/x
  3. Step 3: Cross multiply
    28,685.88x = 43,034.16 × 12,890.52
  4. Step 4: Simplify right side
    28,685.88x = 554,732,700.16
  5. Step 5: Solve for x
    x = 554,732,700.16/28,685.88
  6. Step 6: Final answer
    x = 19,338.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.