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Finding the Fourth Proportional to 37,479.78, 51,722.15 and 20,712.78

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Solution

The fourth proportional to 37,479.78, 51,722.15 and 20,712.78 is: 28,583.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,479.78 : 51,722.15 = 20,712.78 : x
  2. Step 2: Convert to fraction form
    37,479.78/51,722.15 = 20,712.78/x
  3. Step 3: Cross multiply
    37,479.78x = 51,722.15 × 20,712.78
  4. Step 4: Simplify right side
    37,479.78x = 1,071,309,410.51
  5. Step 5: Solve for x
    x = 1,071,309,410.51/37,479.78
  6. Step 6: Final answer
    x = 28,583.66

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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.