Home / 28,461.96-39,279.66-15,717.57

Finding the Fourth Proportional to 28,461.96, 39,279.66 and 15,717.57

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Solution

The fourth proportional to 28,461.96, 39,279.66 and 15,717.57 is: 21,691.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,461.96 : 39,279.66 = 15,717.57 : x
  2. Step 2: Convert to fraction form
    28,461.96/39,279.66 = 15,717.57/x
  3. Step 3: Cross multiply
    28,461.96x = 39,279.66 × 15,717.57
  4. Step 4: Simplify right side
    28,461.96x = 617,380,805.63
  5. Step 5: Solve for x
    x = 617,380,805.63/28,461.96
  6. Step 6: Final answer
    x = 21,691.44

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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.