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Finding the Fourth Proportional to 28,262.40, 42,390.72 and 7,486.08

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Solution

The fourth proportional to 28,262.40, 42,390.72 and 7,486.08 is: 11,228.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,262.40 : 42,390.72 = 7,486.08 : x
  2. Step 2: Convert to fraction form
    28,262.40/42,390.72 = 7,486.08/x
  3. Step 3: Cross multiply
    28,262.40x = 42,390.72 × 7,486.08
  4. Step 4: Simplify right side
    28,262.40x = 317,340,321.18
  5. Step 5: Solve for x
    x = 317,340,321.18/28,262.40
  6. Step 6: Final answer
    x = 11,228.36

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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.