Home / 29,187.20-43,780.80-21,315.20

Finding the Fourth Proportional to 29,187.20, 43,780.80 and 21,315.20

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Solution

The fourth proportional to 29,187.20, 43,780.80 and 21,315.20 is: 31,972.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,187.20 : 43,780.80 = 21,315.20 : x
  2. Step 2: Convert to fraction form
    29,187.20/43,780.80 = 21,315.20/x
  3. Step 3: Cross multiply
    29,187.20x = 43,780.80 × 21,315.20
  4. Step 4: Simplify right side
    29,187.20x = 933,196,508.16
  5. Step 5: Solve for x
    x = 933,196,508.16/29,187.20
  6. Step 6: Final answer
    x = 31,972.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.