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Finding the Fourth Proportional to 26,929.80, 40,411.53 and 10,291.28

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Solution

The fourth proportional to 26,929.80, 40,411.53 and 10,291.28 is: 15,443.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,929.80 : 40,411.53 = 10,291.28 : x
  2. Step 2: Convert to fraction form
    26,929.80/40,411.53 = 10,291.28/x
  3. Step 3: Cross multiply
    26,929.80x = 40,411.53 × 10,291.28
  4. Step 4: Simplify right side
    26,929.80x = 415,886,168.40
  5. Step 5: Solve for x
    x = 415,886,168.40/26,929.80
  6. Step 6: Final answer
    x = 15,443.34

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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.