Home / 28,518.97-39,356.45-15,771.50

Finding the Fourth Proportional to 28,518.97, 39,356.45 and 15,771.50

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Solution

The fourth proportional to 28,518.97, 39,356.45 and 15,771.50 is: 21,764.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.97 : 39,356.45 = 15,771.50 : x
  2. Step 2: Convert to fraction form
    28,518.97/39,356.45 = 15,771.50/x
  3. Step 3: Cross multiply
    28,518.97x = 39,356.45 × 15,771.50
  4. Step 4: Simplify right side
    28,518.97x = 620,710,251.18
  5. Step 5: Solve for x
    x = 620,710,251.18/28,518.97
  6. Step 6: Final answer
    x = 21,764.82

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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.