Home / 21,470.15-29,630.52-11,910.98

Finding the Fourth Proportional to 21,470.15, 29,630.52 and 11,910.98

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Solution

The fourth proportional to 21,470.15, 29,630.52 and 11,910.98 is: 16,438.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,470.15 : 29,630.52 = 11,910.98 : x
  2. Step 2: Convert to fraction form
    21,470.15/29,630.52 = 11,910.98/x
  3. Step 3: Cross multiply
    21,470.15x = 29,630.52 × 11,910.98
  4. Step 4: Simplify right side
    21,470.15x = 352,928,382.96
  5. Step 5: Solve for x
    x = 352,928,382.96/21,470.15
  6. Step 6: Final answer
    x = 16,438.10

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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.