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Finding the Fourth Proportional to 13,339.71, 18,407.60 and 7,672.95

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Solution

The fourth proportional to 13,339.71, 18,407.60 and 7,672.95 is: 10,587.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.71 : 18,407.60 = 7,672.95 : x
  2. Step 2: Convert to fraction form
    13,339.71/18,407.60 = 7,672.95/x
  3. Step 3: Cross multiply
    13,339.71x = 18,407.60 × 7,672.95
  4. Step 4: Simplify right side
    13,339.71x = 141,240,556.06
  5. Step 5: Solve for x
    x = 141,240,556.06/13,339.71
  6. Step 6: Final answer
    x = 10,587.98

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