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Finding the Fourth Proportional to 28,810.88, 39,759.02 and 15,562.88

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Solution

The fourth proportional to 28,810.88, 39,759.02 and 15,562.88 is: 21,476.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,810.88 : 39,759.02 = 15,562.88 : x
  2. Step 2: Convert to fraction form
    28,810.88/39,759.02 = 15,562.88/x
  3. Step 3: Cross multiply
    28,810.88x = 39,759.02 × 15,562.88
  4. Step 4: Simplify right side
    28,810.88x = 618,764,580.57
  5. Step 5: Solve for x
    x = 618,764,580.57/28,810.88
  6. Step 6: Final answer
    x = 21,476.77

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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.