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Finding the Fourth Proportional to 26,688, 36,832.68 and 15,510

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Solution

The fourth proportional to 26,688, 36,832.68 and 15,510 is: 21,405.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,688 : 36,832.68 = 15,510 : x
  2. Step 2: Convert to fraction form
    26,688/36,832.68 = 15,510/x
  3. Step 3: Cross multiply
    26,688x = 36,832.68 × 15,510
  4. Step 4: Simplify right side
    26,688x = 571,274,866.80
  5. Step 5: Solve for x
    x = 571,274,866.80/26,688
  6. Step 6: Final answer
    x = 21,405.68

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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.