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Finding the Fourth Proportional to 12,681.73, 19,023.51 and 3,915.51

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Solution

The fourth proportional to 12,681.73, 19,023.51 and 3,915.51 is: 5,873.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,681.73 : 19,023.51 = 3,915.51 : x
  2. Step 2: Convert to fraction form
    12,681.73/19,023.51 = 3,915.51/x
  3. Step 3: Cross multiply
    12,681.73x = 19,023.51 × 3,915.51
  4. Step 4: Simplify right side
    12,681.73x = 74,486,743.64
  5. Step 5: Solve for x
    x = 74,486,743.64/12,681.73
  6. Step 6: Final answer
    x = 5,873.55

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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.