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Finding the Fourth Proportional to 18,712.84, 28,066.24 and 7,619.08

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Solution

The fourth proportional to 18,712.84, 28,066.24 and 7,619.08 is: 11,427.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.84 : 28,066.24 = 7,619.08 : x
  2. Step 2: Convert to fraction form
    18,712.84/28,066.24 = 7,619.08/x
  3. Step 3: Cross multiply
    18,712.84x = 28,066.24 × 7,619.08
  4. Step 4: Simplify right side
    18,712.84x = 213,838,927.86
  5. Step 5: Solve for x
    x = 213,838,927.86/18,712.84
  6. Step 6: Final answer
    x = 11,427.39

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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.