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Finding the Fourth Proportional to 15,447.71, 21,317.93 and 8,374.11

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Solution

The fourth proportional to 15,447.71, 21,317.93 and 8,374.11 is: 11,556.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,447.71 : 21,317.93 = 8,374.11 : x
  2. Step 2: Convert to fraction form
    15,447.71/21,317.93 = 8,374.11/x
  3. Step 3: Cross multiply
    15,447.71x = 21,317.93 × 8,374.11
  4. Step 4: Simplify right side
    15,447.71x = 178,518,648.92
  5. Step 5: Solve for x
    x = 178,518,648.92/15,447.71
  6. Step 6: Final answer
    x = 11,556.32

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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.