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Finding the Fourth Proportional to 28,352.52, 39,120.84 and 15,774.84

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Solution

The fourth proportional to 28,352.52, 39,120.84 and 15,774.84 is: 21,766.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,352.52 : 39,120.84 = 15,774.84 : x
  2. Step 2: Convert to fraction form
    28,352.52/39,120.84 = 15,774.84/x
  3. Step 3: Cross multiply
    28,352.52x = 39,120.84 × 15,774.84
  4. Step 4: Simplify right side
    28,352.52x = 617,124,991.67
  5. Step 5: Solve for x
    x = 617,124,991.67/28,352.52
  6. Step 6: Final answer
    x = 21,766.14

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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.