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Finding the Fourth Proportional to 18,690.69, 28,036.04 and 7,002.39

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Solution

The fourth proportional to 18,690.69, 28,036.04 and 7,002.39 is: 10,503.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.69 : 28,036.04 = 7,002.39 : x
  2. Step 2: Convert to fraction form
    18,690.69/28,036.04 = 7,002.39/x
  3. Step 3: Cross multiply
    18,690.69x = 28,036.04 × 7,002.39
  4. Step 4: Simplify right side
    18,690.69x = 196,319,251.12
  5. Step 5: Solve for x
    x = 196,319,251.12/18,690.69
  6. Step 6: Final answer
    x = 10,503.59

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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.