Home / 28,618.28-42,920.86-7,843.40

Finding the Fourth Proportional to 28,618.28, 42,920.86 and 7,843.40

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Solution

The fourth proportional to 28,618.28, 42,920.86 and 7,843.40 is: 11,763.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.28 : 42,920.86 = 7,843.40 : x
  2. Step 2: Convert to fraction form
    28,618.28/42,920.86 = 7,843.40/x
  3. Step 3: Cross multiply
    28,618.28x = 42,920.86 × 7,843.40
  4. Step 4: Simplify right side
    28,618.28x = 336,645,473.32
  5. Step 5: Solve for x
    x = 336,645,473.32/28,618.28
  6. Step 6: Final answer
    x = 11,763.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.