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Finding the Fourth Proportional to 29,287.30, 40,416.54 and 15,858.72

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Solution

The fourth proportional to 29,287.30, 40,416.54 and 15,858.72 is: 21,885.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,287.30 : 40,416.54 = 15,858.72 : x
  2. Step 2: Convert to fraction form
    29,287.30/40,416.54 = 15,858.72/x
  3. Step 3: Cross multiply
    29,287.30x = 40,416.54 × 15,858.72
  4. Step 4: Simplify right side
    29,287.30x = 640,954,591.23
  5. Step 5: Solve for x
    x = 640,954,591.23/29,287.30
  6. Step 6: Final answer
    x = 21,885.07

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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.