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Finding the Fourth Proportional to 28,446.61, 42,665.04 and 7,665.25

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Solution

The fourth proportional to 28,446.61, 42,665.04 and 7,665.25 is: 11,496.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,446.61 : 42,665.04 = 7,665.25 : x
  2. Step 2: Convert to fraction form
    28,446.61/42,665.04 = 7,665.25/x
  3. Step 3: Cross multiply
    28,446.61x = 42,665.04 × 7,665.25
  4. Step 4: Simplify right side
    28,446.61x = 327,038,197.86
  5. Step 5: Solve for x
    x = 327,038,197.86/28,446.61
  6. Step 6: Final answer
    x = 11,496.56

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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.