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Finding the Fourth Proportional to 38,894.40, 58,298.40 and 21,376.80

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Solution

The fourth proportional to 38,894.40, 58,298.40 and 21,376.80 is: 32,041.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,894.40 : 58,298.40 = 21,376.80 : x
  2. Step 2: Convert to fraction form
    38,894.40/58,298.40 = 21,376.80/x
  3. Step 3: Cross multiply
    38,894.40x = 58,298.40 × 21,376.80
  4. Step 4: Simplify right side
    38,894.40x = 1,246,233,237.12
  5. Step 5: Solve for x
    x = 1,246,233,237.12/38,894.40
  6. Step 6: Final answer
    x = 32,041.46

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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.