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Finding the Fourth Proportional to 12,556.71, 18,851.46 and 10,621.21

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Solution

The fourth proportional to 12,556.71, 18,851.46 and 10,621.21 is: 15,945.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,556.71 : 18,851.46 = 10,621.21 : x
  2. Step 2: Convert to fraction form
    12,556.71/18,851.46 = 10,621.21/x
  3. Step 3: Cross multiply
    12,556.71x = 18,851.46 × 10,621.21
  4. Step 4: Simplify right side
    12,556.71x = 200,225,315.47
  5. Step 5: Solve for x
    x = 200,225,315.47/12,556.71
  6. Step 6: Final answer
    x = 15,945.68

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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.