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Finding the Fourth Proportional to 28,015.36, 42,019.68 and 7,238.08

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Solution

The fourth proportional to 28,015.36, 42,019.68 and 7,238.08 is: 10,856.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015.36 : 42,019.68 = 7,238.08 : x
  2. Step 2: Convert to fraction form
    28,015.36/42,019.68 = 7,238.08/x
  3. Step 3: Cross multiply
    28,015.36x = 42,019.68 × 7,238.08
  4. Step 4: Simplify right side
    28,015.36x = 304,141,805.41
  5. Step 5: Solve for x
    x = 304,141,805.41/28,015.36
  6. Step 6: Final answer
    x = 10,856.25

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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.