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Finding the Fourth Proportional to 28,648.40, 42,967.64 and 7,867.04

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Solution

The fourth proportional to 28,648.40, 42,967.64 and 7,867.04 is: 11,799.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,648.40 : 42,967.64 = 7,867.04 : x
  2. Step 2: Convert to fraction form
    28,648.40/42,967.64 = 7,867.04/x
  3. Step 3: Cross multiply
    28,648.40x = 42,967.64 × 7,867.04
  4. Step 4: Simplify right side
    28,648.40x = 338,028,142.59
  5. Step 5: Solve for x
    x = 338,028,142.59/28,648.40
  6. Step 6: Final answer
    x = 11,799.20

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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.