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Finding the Fourth Proportional to 28,340.64, 42,508.73 and 8,619.17

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Solution

The fourth proportional to 28,340.64, 42,508.73 and 8,619.17 is: 12,928.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,340.64 : 42,508.73 = 8,619.17 : x
  2. Step 2: Convert to fraction form
    28,340.64/42,508.73 = 8,619.17/x
  3. Step 3: Cross multiply
    28,340.64x = 42,508.73 × 8,619.17
  4. Step 4: Simplify right side
    28,340.64x = 366,389,779.36
  5. Step 5: Solve for x
    x = 366,389,779.36/28,340.64
  6. Step 6: Final answer
    x = 12,928.07

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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.