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Finding the Fourth Proportional to 28,318.82, 42,478.02 and 7,258.82

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Solution

The fourth proportional to 28,318.82, 42,478.02 and 7,258.82 is: 10,888.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.82 : 42,478.02 = 7,258.82 : x
  2. Step 2: Convert to fraction form
    28,318.82/42,478.02 = 7,258.82/x
  3. Step 3: Cross multiply
    28,318.82x = 42,478.02 × 7,258.82
  4. Step 4: Simplify right side
    28,318.82x = 308,340,088.75
  5. Step 5: Solve for x
    x = 308,340,088.75/28,318.82
  6. Step 6: Final answer
    x = 10,888.17

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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.