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Finding the Fourth Proportional to 18,973.21, 28,454.86 and 5,642.62

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Solution

The fourth proportional to 18,973.21, 28,454.86 and 5,642.62 is: 8,462.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.21 : 28,454.86 = 5,642.62 : x
  2. Step 2: Convert to fraction form
    18,973.21/28,454.86 = 5,642.62/x
  3. Step 3: Cross multiply
    18,973.21x = 28,454.86 × 5,642.62
  4. Step 4: Simplify right side
    18,973.21x = 160,560,074.32
  5. Step 5: Solve for x
    x = 160,560,074.32/18,973.21
  6. Step 6: Final answer
    x = 8,462.46

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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.