Home / 28,620.28-42,930.78-8,898.40

Finding the Fourth Proportional to 28,620.28, 42,930.78 and 8,898.40

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Solution

The fourth proportional to 28,620.28, 42,930.78 and 8,898.40 is: 13,347.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,620.28 : 42,930.78 = 8,898.40 : x
  2. Step 2: Convert to fraction form
    28,620.28/42,930.78 = 8,898.40/x
  3. Step 3: Cross multiply
    28,620.28x = 42,930.78 × 8,898.40
  4. Step 4: Simplify right side
    28,620.28x = 382,015,252.75
  5. Step 5: Solve for x
    x = 382,015,252.75/28,620.28
  6. Step 6: Final answer
    x = 13,347.71

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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.