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Finding the Fourth Proportional to 29,308.60, 40,445.84 and 15,880.20

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Solution

The fourth proportional to 29,308.60, 40,445.84 and 15,880.20 is: 21,914.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,308.60 : 40,445.84 = 15,880.20 : x
  2. Step 2: Convert to fraction form
    29,308.60/40,445.84 = 15,880.20/x
  3. Step 3: Cross multiply
    29,308.60x = 40,445.84 × 15,880.20
  4. Step 4: Simplify right side
    29,308.60x = 642,288,028.37
  5. Step 5: Solve for x
    x = 642,288,028.37/29,308.60
  6. Step 6: Final answer
    x = 21,914.66

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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.