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Finding the Fourth Proportional to 28,427, 39,230.07 and 15,852.56

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Solution

The fourth proportional to 28,427, 39,230.07 and 15,852.56 is: 21,876.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427 : 39,230.07 = 15,852.56 : x
  2. Step 2: Convert to fraction form
    28,427/39,230.07 = 15,852.56/x
  3. Step 3: Cross multiply
    28,427x = 39,230.07 × 15,852.56
  4. Step 4: Simplify right side
    28,427x = 621,897,038.48
  5. Step 5: Solve for x
    x = 621,897,038.48/28,427
  6. Step 6: Final answer
    x = 21,876.98

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1.5x scale

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.