Home / 28,364.82-39,143.12-15,617.74

Finding the Fourth Proportional to 28,364.82, 39,143.12 and 15,617.74

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Solution

The fourth proportional to 28,364.82, 39,143.12 and 15,617.74 is: 21,552.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.82 : 39,143.12 = 15,617.74 : x
  2. Step 2: Convert to fraction form
    28,364.82/39,143.12 = 15,617.74/x
  3. Step 3: Cross multiply
    28,364.82x = 39,143.12 × 15,617.74
  4. Step 4: Simplify right side
    28,364.82x = 611,326,990.08
  5. Step 5: Solve for x
    x = 611,326,990.08/28,364.82
  6. Step 6: Final answer
    x = 21,552.30

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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.