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Finding the Fourth Proportional to 38,606.80, 57,870.53 and 21,931.23

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Solution

The fourth proportional to 38,606.80, 57,870.53 and 21,931.23 is: 32,874.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,606.80 : 57,870.53 = 21,931.23 : x
  2. Step 2: Convert to fraction form
    38,606.80/57,870.53 = 21,931.23/x
  3. Step 3: Cross multiply
    38,606.80x = 57,870.53 × 21,931.23
  4. Step 4: Simplify right side
    38,606.80x = 1,269,171,903.65
  5. Step 5: Solve for x
    x = 1,269,171,903.65/38,606.80
  6. Step 6: Final answer
    x = 32,874.31

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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.