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Finding the Fourth Proportional to 29,309.87, 40,447.55 and 15,881.48

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Solution

The fourth proportional to 29,309.87, 40,447.55 and 15,881.48 is: 21,916.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,309.87 : 40,447.55 = 15,881.48 : x
  2. Step 2: Convert to fraction form
    29,309.87/40,447.55 = 15,881.48/x
  3. Step 3: Cross multiply
    29,309.87x = 40,447.55 × 15,881.48
  4. Step 4: Simplify right side
    29,309.87x = 642,367,173.04
  5. Step 5: Solve for x
    x = 642,367,173.04/29,309.87
  6. Step 6: Final answer
    x = 21,916.41

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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.