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Finding the Fourth Proportional to 12,428.99, 17,148.14 and 7,050.54

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Solution

The fourth proportional to 12,428.99, 17,148.14 and 7,050.54 is: 9,727.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.99 : 17,148.14 = 7,050.54 : x
  2. Step 2: Convert to fraction form
    12,428.99/17,148.14 = 7,050.54/x
  3. Step 3: Cross multiply
    12,428.99x = 17,148.14 × 7,050.54
  4. Step 4: Simplify right side
    12,428.99x = 120,903,664.62
  5. Step 5: Solve for x
    x = 120,903,664.62/12,428.99
  6. Step 6: Final answer
    x = 9,727.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.