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Finding the Fourth Proportional to 38,614.40, 57,921.60 and 10,912.40

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Solution

The fourth proportional to 38,614.40, 57,921.60 and 10,912.40 is: 16,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,614.40 : 57,921.60 = 10,912.40 : x
  2. Step 2: Convert to fraction form
    38,614.40/57,921.60 = 10,912.40/x
  3. Step 3: Cross multiply
    38,614.40x = 57,921.60 × 10,912.40
  4. Step 4: Simplify right side
    38,614.40x = 632,063,667.84
  5. Step 5: Solve for x
    x = 632,063,667.84/38,614.40
  6. Step 6: Final answer
    x = 16,368.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.