Home / 28,518.40-39,356.16-15,942.40

Finding the Fourth Proportional to 28,518.40, 39,356.16 and 15,942.40

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Solution

The fourth proportional to 28,518.40, 39,356.16 and 15,942.40 is: 22,000.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.40 : 39,356.16 = 15,942.40 : x
  2. Step 2: Convert to fraction form
    28,518.40/39,356.16 = 15,942.40/x
  3. Step 3: Cross multiply
    28,518.40x = 39,356.16 × 15,942.40
  4. Step 4: Simplify right side
    28,518.40x = 627,431,645.18
  5. Step 5: Solve for x
    x = 627,431,645.18/28,518.40
  6. Step 6: Final answer
    x = 22,000.94

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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.