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Finding the Fourth Proportional to 18,784.40, 28,177.40 and 7,098.52

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Solution

The fourth proportional to 18,784.40, 28,177.40 and 7,098.52 is: 10,648.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,784.40 : 28,177.40 = 7,098.52 : x
  2. Step 2: Convert to fraction form
    18,784.40/28,177.40 = 7,098.52/x
  3. Step 3: Cross multiply
    18,784.40x = 28,177.40 × 7,098.52
  4. Step 4: Simplify right side
    18,784.40x = 200,017,837.45
  5. Step 5: Solve for x
    x = 200,017,837.45/18,784.40
  6. Step 6: Final answer
    x = 10,648.08

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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.