Home / 20,489.70-28,275.48-11,537.18

Finding the Fourth Proportional to 20,489.70, 28,275.48 and 11,537.18

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Solution

The fourth proportional to 20,489.70, 28,275.48 and 11,537.18 is: 15,921.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.70 : 28,275.48 = 11,537.18 : x
  2. Step 2: Convert to fraction form
    20,489.70/28,275.48 = 11,537.18/x
  3. Step 3: Cross multiply
    20,489.70x = 28,275.48 × 11,537.18
  4. Step 4: Simplify right side
    20,489.70x = 326,219,302.35
  5. Step 5: Solve for x
    x = 326,219,302.35/20,489.70
  6. Step 6: Final answer
    x = 15,921.14

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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.