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Finding the Fourth Proportional to 28,578.92, 42,859.30 and 26,713.16

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Solution

The fourth proportional to 28,578.92, 42,859.30 and 26,713.16 is: 40,061.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.92 : 42,859.30 = 26,713.16 : x
  2. Step 2: Convert to fraction form
    28,578.92/42,859.30 = 26,713.16/x
  3. Step 3: Cross multiply
    28,578.92x = 42,859.30 × 26,713.16
  4. Step 4: Simplify right side
    28,578.92x = 1,144,907,328.67
  5. Step 5: Solve for x
    x = 1,144,907,328.67/28,578.92
  6. Step 6: Final answer
    x = 40,061.25

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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.