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Finding the Fourth Proportional to 28,661.60, 42,992.40 and 7,601.60

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Solution

The fourth proportional to 28,661.60, 42,992.40 and 7,601.60 is: 11,402.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,661.60 : 42,992.40 = 7,601.60 : x
  2. Step 2: Convert to fraction form
    28,661.60/42,992.40 = 7,601.60/x
  3. Step 3: Cross multiply
    28,661.60x = 42,992.40 × 7,601.60
  4. Step 4: Simplify right side
    28,661.60x = 326,811,027.84
  5. Step 5: Solve for x
    x = 326,811,027.84/28,661.60
  6. Step 6: Final answer
    x = 11,402.40

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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.