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Finding the Fourth Proportional to 29,256, 40,373.76 and 20,886.72

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Solution

The fourth proportional to 29,256, 40,373.76 and 20,886.72 is: 28,824.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,256 : 40,373.76 = 20,886.72 : x
  2. Step 2: Convert to fraction form
    29,256/40,373.76 = 20,886.72/x
  3. Step 3: Cross multiply
    29,256x = 40,373.76 × 20,886.72
  4. Step 4: Simplify right side
    29,256x = 843,275,420.47
  5. Step 5: Solve for x
    x = 843,275,420.47/29,256
  6. Step 6: Final answer
    x = 28,824.02

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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.