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Finding the Fourth Proportional to 28,442.99, 42,659.62 and 7,661.63

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Solution

The fourth proportional to 28,442.99, 42,659.62 and 7,661.63 is: 11,491.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.99 : 42,659.62 = 7,661.63 : x
  2. Step 2: Convert to fraction form
    28,442.99/42,659.62 = 7,661.63/x
  3. Step 3: Cross multiply
    28,442.99x = 42,659.62 × 7,661.63
  4. Step 4: Simplify right side
    28,442.99x = 326,841,991.93
  5. Step 5: Solve for x
    x = 326,841,991.93/28,442.99
  6. Step 6: Final answer
    x = 11,491.13

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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.