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Finding the Fourth Proportional to 38,427.50, 53,030.76 and 21,660.50

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Solution

The fourth proportional to 38,427.50, 53,030.76 and 21,660.50 is: 29,891.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,427.50 : 53,030.76 = 21,660.50 : x
  2. Step 2: Convert to fraction form
    38,427.50/53,030.76 = 21,660.50/x
  3. Step 3: Cross multiply
    38,427.50x = 53,030.76 × 21,660.50
  4. Step 4: Simplify right side
    38,427.50x = 1,148,672,776.98
  5. Step 5: Solve for x
    x = 1,148,672,776.98/38,427.50
  6. Step 6: Final answer
    x = 29,891.95

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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.