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Finding the Fourth Proportional to 29,310, 40,447.56 and 15,881.22

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Solution

The fourth proportional to 29,310, 40,447.56 and 15,881.22 is: 21,915.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,310 : 40,447.56 = 15,881.22 : x
  2. Step 2: Convert to fraction form
    29,310/40,447.56 = 15,881.22/x
  3. Step 3: Cross multiply
    29,310x = 40,447.56 × 15,881.22
  4. Step 4: Simplify right side
    29,310x = 642,356,598.82
  5. Step 5: Solve for x
    x = 642,356,598.82/29,310
  6. Step 6: Final answer
    x = 21,915.95

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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.