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Finding the Fourth Proportional to 18,726.42, 28,045.44 and 9,820.47

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Solution

The fourth proportional to 18,726.42, 28,045.44 and 9,820.47 is: 14,707.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.42 : 28,045.44 = 9,820.47 : x
  2. Step 2: Convert to fraction form
    18,726.42/28,045.44 = 9,820.47/x
  3. Step 3: Cross multiply
    18,726.42x = 28,045.44 × 9,820.47
  4. Step 4: Simplify right side
    18,726.42x = 275,419,507.33
  5. Step 5: Solve for x
    x = 275,419,507.33/18,726.42
  6. Step 6: Final answer
    x = 14,707.53

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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.