Home / 20,717.50-28,590.36-11,765.20

Finding the Fourth Proportional to 20,717.50, 28,590.36 and 11,765.20

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Solution

The fourth proportional to 20,717.50, 28,590.36 and 11,765.20 is: 16,236.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.50 : 28,590.36 = 11,765.20 : x
  2. Step 2: Convert to fraction form
    20,717.50/28,590.36 = 11,765.20/x
  3. Step 3: Cross multiply
    20,717.50x = 28,590.36 × 11,765.20
  4. Step 4: Simplify right side
    20,717.50x = 336,371,303.47
  5. Step 5: Solve for x
    x = 336,371,303.47/20,717.50
  6. Step 6: Final answer
    x = 16,236.10

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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.