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Finding the Fourth Proportional to 18,969.84, 28,458.09 and 6,486.93

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Solution

The fourth proportional to 18,969.84, 28,458.09 and 6,486.93 is: 9,731.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.84 : 28,458.09 = 6,486.93 : x
  2. Step 2: Convert to fraction form
    18,969.84/28,458.09 = 6,486.93/x
  3. Step 3: Cross multiply
    18,969.84x = 28,458.09 × 6,486.93
  4. Step 4: Simplify right side
    18,969.84x = 184,605,637.76
  5. Step 5: Solve for x
    x = 184,605,637.76/18,969.84
  6. Step 6: Final answer
    x = 9,731.53

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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.