Home / 28,129.96-42,210.78-19,371.88

Finding the Fourth Proportional to 28,129.96, 42,210.78 and 19,371.88

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Solution

The fourth proportional to 28,129.96, 42,210.78 and 19,371.88 is: 29,068.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.96 : 42,210.78 = 19,371.88 : x
  2. Step 2: Convert to fraction form
    28,129.96/42,210.78 = 19,371.88/x
  3. Step 3: Cross multiply
    28,129.96x = 42,210.78 × 19,371.88
  4. Step 4: Simplify right side
    28,129.96x = 817,702,164.87
  5. Step 5: Solve for x
    x = 817,702,164.87/28,129.96
  6. Step 6: Final answer
    x = 29,068.73

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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.