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Finding the Fourth Proportional to 18,969.82, 28,458.07 and 6,486.91

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Solution

The fourth proportional to 18,969.82, 28,458.07 and 6,486.91 is: 9,731.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.82 : 28,458.07 = 6,486.91 : x
  2. Step 2: Convert to fraction form
    18,969.82/28,458.07 = 6,486.91/x
  3. Step 3: Cross multiply
    18,969.82x = 28,458.07 × 6,486.91
  4. Step 4: Simplify right side
    18,969.82x = 184,604,851.50
  5. Step 5: Solve for x
    x = 184,604,851.50/18,969.82
  6. Step 6: Final answer
    x = 9,731.50

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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.