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Finding the Fourth Proportional to 28,698.80, 39,603.80 and 15,951.84

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Solution

The fourth proportional to 28,698.80, 39,603.80 and 15,951.84 is: 22,013.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,698.80 : 39,603.80 = 15,951.84 : x
  2. Step 2: Convert to fraction form
    28,698.80/39,603.80 = 15,951.84/x
  3. Step 3: Cross multiply
    28,698.80x = 39,603.80 × 15,951.84
  4. Step 4: Simplify right side
    28,698.80x = 631,753,480.99
  5. Step 5: Solve for x
    x = 631,753,480.99/28,698.80
  6. Step 6: Final answer
    x = 22,013.24

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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.