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Finding the Fourth Proportional to 8,624.28, 12,938.07 and 2,779.32

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Solution

The fourth proportional to 8,624.28, 12,938.07 and 2,779.32 is: 4,169.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,624.28 : 12,938.07 = 2,779.32 : x
  2. Step 2: Convert to fraction form
    8,624.28/12,938.07 = 2,779.32/x
  3. Step 3: Cross multiply
    8,624.28x = 12,938.07 × 2,779.32
  4. Step 4: Simplify right side
    8,624.28x = 35,959,036.71
  5. Step 5: Solve for x
    x = 35,959,036.71/8,624.28
  6. Step 6: Final answer
    x = 4,169.51

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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.