Home / 20,697.47-28,508.10-15,908.26

Finding the Fourth Proportional to 20,697.47, 28,508.10 and 15,908.26

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Solution

The fourth proportional to 20,697.47, 28,508.10 and 15,908.26 is: 21,911.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.47 : 28,508.10 = 15,908.26 : x
  2. Step 2: Convert to fraction form
    20,697.47/28,508.10 = 15,908.26/x
  3. Step 3: Cross multiply
    20,697.47x = 28,508.10 × 15,908.26
  4. Step 4: Simplify right side
    20,697.47x = 453,514,195.64
  5. Step 5: Solve for x
    x = 453,514,195.64/20,697.47
  6. Step 6: Final answer
    x = 21,911.57

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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.