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Finding the Fourth Proportional to 12,634.99, 18,870.42 and 11,880.47

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Solution

The fourth proportional to 12,634.99, 18,870.42 and 11,880.47 is: 17,743.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,634.99 : 18,870.42 = 11,880.47 : x
  2. Step 2: Convert to fraction form
    12,634.99/18,870.42 = 11,880.47/x
  3. Step 3: Cross multiply
    12,634.99x = 18,870.42 × 11,880.47
  4. Step 4: Simplify right side
    12,634.99x = 224,189,483.60
  5. Step 5: Solve for x
    x = 224,189,483.60/12,634.99
  6. Step 6: Final answer
    x = 17,743.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.