Home / 28,919.10-43,390.80-15,780.90

Finding the Fourth Proportional to 28,919.10, 43,390.80 and 15,780.90

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Solution

The fourth proportional to 28,919.10, 43,390.80 and 15,780.90 is: 23,677.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.10 : 43,390.80 = 15,780.90 : x
  2. Step 2: Convert to fraction form
    28,919.10/43,390.80 = 15,780.90/x
  3. Step 3: Cross multiply
    28,919.10x = 43,390.80 × 15,780.90
  4. Step 4: Simplify right side
    28,919.10x = 684,745,875.72
  5. Step 5: Solve for x
    x = 684,745,875.72/28,919.10
  6. Step 6: Final answer
    x = 23,677.98

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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.