Home / 19,780.76-27,306.36-12,620.32

Finding the Fourth Proportional to 19,780.76, 27,306.36 and 12,620.32

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Solution

The fourth proportional to 19,780.76, 27,306.36 and 12,620.32 is: 17,421.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,780.76 : 27,306.36 = 12,620.32 : x
  2. Step 2: Convert to fraction form
    19,780.76/27,306.36 = 12,620.32/x
  3. Step 3: Cross multiply
    19,780.76x = 27,306.36 × 12,620.32
  4. Step 4: Simplify right side
    19,780.76x = 344,615,001.24
  5. Step 5: Solve for x
    x = 344,615,001.24/19,780.76
  6. Step 6: Final answer
    x = 17,421.73

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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.