Home / 21,960.30-30,305.55-12,400.74

Finding the Fourth Proportional to 21,960.30, 30,305.55 and 12,400.74

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Solution

The fourth proportional to 21,960.30, 30,305.55 and 12,400.74 is: 17,113.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.30 : 30,305.55 = 12,400.74 : x
  2. Step 2: Convert to fraction form
    21,960.30/30,305.55 = 12,400.74/x
  3. Step 3: Cross multiply
    21,960.30x = 30,305.55 × 12,400.74
  4. Step 4: Simplify right side
    21,960.30x = 375,811,246.11
  5. Step 5: Solve for x
    x = 375,811,246.11/21,960.30
  6. Step 6: Final answer
    x = 17,113.21

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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.