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Finding the Fourth Proportional to 28,678.80, 43,019.28 and 7,903.92

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Solution

The fourth proportional to 28,678.80, 43,019.28 and 7,903.92 is: 11,856.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,678.80 : 43,019.28 = 7,903.92 : x
  2. Step 2: Convert to fraction form
    28,678.80/43,019.28 = 7,903.92/x
  3. Step 3: Cross multiply
    28,678.80x = 43,019.28 × 7,903.92
  4. Step 4: Simplify right side
    28,678.80x = 340,020,947.58
  5. Step 5: Solve for x
    x = 340,020,947.58/28,678.80
  6. Step 6: Final answer
    x = 11,856.18

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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.