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Finding the Fourth Proportional to 11,681.52, 17,528.96 and 4,285

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Solution

The fourth proportional to 11,681.52, 17,528.96 and 4,285 is: 6,429.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,681.52 : 17,528.96 = 4,285 : x
  2. Step 2: Convert to fraction form
    11,681.52/17,528.96 = 4,285/x
  3. Step 3: Cross multiply
    11,681.52x = 17,528.96 × 4,285
  4. Step 4: Simplify right side
    11,681.52x = 75,111,593.60
  5. Step 5: Solve for x
    x = 75,111,593.60/11,681.52
  6. Step 6: Final answer
    x = 6,429.95

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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.