Home / 28,438.07-42,665.30-8,719.53

Finding the Fourth Proportional to 28,438.07, 42,665.30 and 8,719.53

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Solution

The fourth proportional to 28,438.07, 42,665.30 and 8,719.53 is: 13,081.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.07 : 42,665.30 = 8,719.53 : x
  2. Step 2: Convert to fraction form
    28,438.07/42,665.30 = 8,719.53/x
  3. Step 3: Cross multiply
    28,438.07x = 42,665.30 × 8,719.53
  4. Step 4: Simplify right side
    28,438.07x = 372,021,363.31
  5. Step 5: Solve for x
    x = 372,021,363.31/28,438.07
  6. Step 6: Final answer
    x = 13,081.81

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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.