Home / 21,918.20-30,248.57-12,486.83

Finding the Fourth Proportional to 21,918.20, 30,248.57 and 12,486.83

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Solution

The fourth proportional to 21,918.20, 30,248.57 and 12,486.83 is: 17,232.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.20 : 30,248.57 = 12,486.83 : x
  2. Step 2: Convert to fraction form
    21,918.20/30,248.57 = 12,486.83/x
  3. Step 3: Cross multiply
    21,918.20x = 30,248.57 × 12,486.83
  4. Step 4: Simplify right side
    21,918.20x = 377,708,631.31
  5. Step 5: Solve for x
    x = 377,708,631.31/21,918.20
  6. Step 6: Final answer
    x = 17,232.65

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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.