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Finding the Fourth Proportional to 12,548.99, 18,828.10 and 5,151.47

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Solution

The fourth proportional to 12,548.99, 18,828.10 and 5,151.47 is: 7,729.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,548.99 : 18,828.10 = 5,151.47 : x
  2. Step 2: Convert to fraction form
    12,548.99/18,828.10 = 5,151.47/x
  3. Step 3: Cross multiply
    12,548.99x = 18,828.10 × 5,151.47
  4. Step 4: Simplify right side
    12,548.99x = 96,992,298.17
  5. Step 5: Solve for x
    x = 96,992,298.17/12,548.99
  6. Step 6: Final answer
    x = 7,729.09

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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.