Home / 28,541.68-42,815.40-9,819.20

Finding the Fourth Proportional to 28,541.68, 42,815.40 and 9,819.20

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Solution

The fourth proportional to 28,541.68, 42,815.40 and 9,819.20 is: 14,729.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,541.68 : 42,815.40 = 9,819.20 : x
  2. Step 2: Convert to fraction form
    28,541.68/42,815.40 = 9,819.20/x
  3. Step 3: Cross multiply
    28,541.68x = 42,815.40 × 9,819.20
  4. Step 4: Simplify right side
    28,541.68x = 420,412,975.68
  5. Step 5: Solve for x
    x = 420,412,975.68/28,541.68
  6. Step 6: Final answer
    x = 14,729.79

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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.