Home / 20,117.70-27,789.48-15,460.20

Finding the Fourth Proportional to 20,117.70, 27,789.48 and 15,460.20

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Solution

The fourth proportional to 20,117.70, 27,789.48 and 15,460.20 is: 21,355.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,117.70 : 27,789.48 = 15,460.20 : x
  2. Step 2: Convert to fraction form
    20,117.70/27,789.48 = 15,460.20/x
  3. Step 3: Cross multiply
    20,117.70x = 27,789.48 × 15,460.20
  4. Step 4: Simplify right side
    20,117.70x = 429,630,918.70
  5. Step 5: Solve for x
    x = 429,630,918.70/20,117.70
  6. Step 6: Final answer
    x = 21,355.87

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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.