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Finding the Fourth Proportional to 26,391.80, 36,424.80 and 15,061.28

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Solution

The fourth proportional to 26,391.80, 36,424.80 and 15,061.28 is: 20,786.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,391.80 : 36,424.80 = 15,061.28 : x
  2. Step 2: Convert to fraction form
    26,391.80/36,424.80 = 15,061.28/x
  3. Step 3: Cross multiply
    26,391.80x = 36,424.80 × 15,061.28
  4. Step 4: Simplify right side
    26,391.80x = 548,604,111.74
  5. Step 5: Solve for x
    x = 548,604,111.74/26,391.80
  6. Step 6: Final answer
    x = 20,786.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.