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Finding the Fourth Proportional to 38,953, 58,400.34 and 12,642.04

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Solution

The fourth proportional to 38,953, 58,400.34 and 12,642.04 is: 18,953.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,953 : 58,400.34 = 12,642.04 : x
  2. Step 2: Convert to fraction form
    38,953/58,400.34 = 12,642.04/x
  3. Step 3: Cross multiply
    38,953x = 58,400.34 × 12,642.04
  4. Step 4: Simplify right side
    38,953x = 738,299,434.29
  5. Step 5: Solve for x
    x = 738,299,434.29/38,953
  6. Step 6: Final answer
    x = 18,953.60

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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.