Home / 28,209.88-42,312.42-11,565.16

Finding the Fourth Proportional to 28,209.88, 42,312.42 and 11,565.16

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Solution

The fourth proportional to 28,209.88, 42,312.42 and 11,565.16 is: 17,346.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.88 : 42,312.42 = 11,565.16 : x
  2. Step 2: Convert to fraction form
    28,209.88/42,312.42 = 11,565.16/x
  3. Step 3: Cross multiply
    28,209.88x = 42,312.42 × 11,565.16
  4. Step 4: Simplify right side
    28,209.88x = 489,349,907.29
  5. Step 5: Solve for x
    x = 489,349,907.29/28,209.88
  6. Step 6: Final answer
    x = 17,346.76

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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.