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Finding the Fourth Proportional to 29,308.30, 40,445.40 and 15,879.90

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Solution

The fourth proportional to 29,308.30, 40,445.40 and 15,879.90 is: 21,914.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,308.30 : 40,445.40 = 15,879.90 : x
  2. Step 2: Convert to fraction form
    29,308.30/40,445.40 = 15,879.90/x
  3. Step 3: Cross multiply
    29,308.30x = 40,445.40 × 15,879.90
  4. Step 4: Simplify right side
    29,308.30x = 642,268,907.46
  5. Step 5: Solve for x
    x = 642,268,907.46/29,308.30
  6. Step 6: Final answer
    x = 21,914.23

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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.