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Finding the Fourth Proportional to 18,868.34, 28,308.66 and 9,007.71

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Solution

The fourth proportional to 18,868.34, 28,308.66 and 9,007.71 is: 13,514.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.34 : 28,308.66 = 9,007.71 : x
  2. Step 2: Convert to fraction form
    18,868.34/28,308.66 = 9,007.71/x
  3. Step 3: Cross multiply
    18,868.34x = 28,308.66 × 9,007.71
  4. Step 4: Simplify right side
    18,868.34x = 254,996,135.83
  5. Step 5: Solve for x
    x = 254,996,135.83/18,868.34
  6. Step 6: Final answer
    x = 13,514.50

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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.