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Finding the Fourth Proportional to 15,900.86, 23,836.69 and 7,130.99

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Solution

The fourth proportional to 15,900.86, 23,836.69 and 7,130.99 is: 10,689.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,900.86 : 23,836.69 = 7,130.99 : x
  2. Step 2: Convert to fraction form
    15,900.86/23,836.69 = 7,130.99/x
  3. Step 3: Cross multiply
    15,900.86x = 23,836.69 × 7,130.99
  4. Step 4: Simplify right side
    15,900.86x = 169,979,198.02
  5. Step 5: Solve for x
    x = 169,979,198.02/15,900.86
  6. Step 6: Final answer
    x = 10,689.94

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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.