Home / 28,560.67-39,415.19-15,815.25

Finding the Fourth Proportional to 28,560.67, 39,415.19 and 15,815.25

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Solution

The fourth proportional to 28,560.67, 39,415.19 and 15,815.25 is: 21,825.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,560.67 : 39,415.19 = 15,815.25 : x
  2. Step 2: Convert to fraction form
    28,560.67/39,415.19 = 15,815.25/x
  3. Step 3: Cross multiply
    28,560.67x = 39,415.19 × 15,815.25
  4. Step 4: Simplify right side
    28,560.67x = 623,360,886.57
  5. Step 5: Solve for x
    x = 623,360,886.57/28,560.67
  6. Step 6: Final answer
    x = 21,825.85

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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.