Home / 28,306.88-39,063.51-15,731.63

Finding the Fourth Proportional to 28,306.88, 39,063.51 and 15,731.63

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Solution

The fourth proportional to 28,306.88, 39,063.51 and 15,731.63 is: 21,709.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,306.88 : 39,063.51 = 15,731.63 : x
  2. Step 2: Convert to fraction form
    28,306.88/39,063.51 = 15,731.63/x
  3. Step 3: Cross multiply
    28,306.88x = 39,063.51 × 15,731.63
  4. Step 4: Simplify right side
    28,306.88x = 614,532,490.50
  5. Step 5: Solve for x
    x = 614,532,490.50/28,306.88
  6. Step 6: Final answer
    x = 21,709.66

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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.