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Finding the Fourth Proportional to 29,656, 40,925.28 and 18,478

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Solution

The fourth proportional to 29,656, 40,925.28 and 18,478 is: 25,499.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,656 : 40,925.28 = 18,478 : x
  2. Step 2: Convert to fraction form
    29,656/40,925.28 = 18,478/x
  3. Step 3: Cross multiply
    29,656x = 40,925.28 × 18,478
  4. Step 4: Simplify right side
    29,656x = 756,217,323.84
  5. Step 5: Solve for x
    x = 756,217,323.84/29,656
  6. Step 6: Final answer
    x = 25,499.64

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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.