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Finding the Fourth Proportional to 28,950.75, 39,952.04 and 15,702.75

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Solution

The fourth proportional to 28,950.75, 39,952.04 and 15,702.75 is: 21,669.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,950.75 : 39,952.04 = 15,702.75 : x
  2. Step 2: Convert to fraction form
    28,950.75/39,952.04 = 15,702.75/x
  3. Step 3: Cross multiply
    28,950.75x = 39,952.04 × 15,702.75
  4. Step 4: Simplify right side
    28,950.75x = 627,356,817.60
  5. Step 5: Solve for x
    x = 627,356,817.60/28,950.75
  6. Step 6: Final answer
    x = 21,669.80

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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.