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Finding the Fourth Proportional to 18,777.68, 28,147.84 and 10,461.48

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Solution

The fourth proportional to 18,777.68, 28,147.84 and 10,461.48 is: 15,681.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,777.68 : 28,147.84 = 10,461.48 : x
  2. Step 2: Convert to fraction form
    18,777.68/28,147.84 = 10,461.48/x
  3. Step 3: Cross multiply
    18,777.68x = 28,147.84 × 10,461.48
  4. Step 4: Simplify right side
    18,777.68x = 294,468,065.20
  5. Step 5: Solve for x
    x = 294,468,065.20/18,777.68
  6. Step 6: Final answer
    x = 15,681.81

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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.