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Finding the Fourth Proportional to 28,019.40, 42,016.14 and 8,293.20

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Solution

The fourth proportional to 28,019.40, 42,016.14 and 8,293.20 is: 12,435.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,019.40 : 42,016.14 = 8,293.20 : x
  2. Step 2: Convert to fraction form
    28,019.40/42,016.14 = 8,293.20/x
  3. Step 3: Cross multiply
    28,019.40x = 42,016.14 × 8,293.20
  4. Step 4: Simplify right side
    28,019.40x = 348,448,252.25
  5. Step 5: Solve for x
    x = 348,448,252.25/28,019.40
  6. Step 6: Final answer
    x = 12,435.96

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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.