Home / 28,364.25-39,142.67-15,788.73

Finding the Fourth Proportional to 28,364.25, 39,142.67 and 15,788.73

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Solution

The fourth proportional to 28,364.25, 39,142.67 and 15,788.73 is: 21,788.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.25 : 39,142.67 = 15,788.73 : x
  2. Step 2: Convert to fraction form
    28,364.25/39,142.67 = 15,788.73/x
  3. Step 3: Cross multiply
    28,364.25x = 39,142.67 × 15,788.73
  4. Step 4: Simplify right side
    28,364.25x = 618,012,969.17
  5. Step 5: Solve for x
    x = 618,012,969.17/28,364.25
  6. Step 6: Final answer
    x = 21,788.45

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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.