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Finding the Fourth Proportional to 34,728, 47,925.60 and 21,291.52

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Solution

The fourth proportional to 34,728, 47,925.60 and 21,291.52 is: 29,382.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,728 : 47,925.60 = 21,291.52 : x
  2. Step 2: Convert to fraction form
    34,728/47,925.60 = 21,291.52/x
  3. Step 3: Cross multiply
    34,728x = 47,925.60 × 21,291.52
  4. Step 4: Simplify right side
    34,728x = 1,020,408,870.91
  5. Step 5: Solve for x
    x = 1,020,408,870.91/34,728
  6. Step 6: Final answer
    x = 29,382.89

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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.