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Finding the Fourth Proportional to 18,690.08, 28,035.68 and 7,001.12

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Solution

The fourth proportional to 18,690.08, 28,035.68 and 7,001.12 is: 10,501.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.08 : 28,035.68 = 7,001.12 : x
  2. Step 2: Convert to fraction form
    18,690.08/28,035.68 = 7,001.12/x
  3. Step 3: Cross multiply
    18,690.08x = 28,035.68 × 7,001.12
  4. Step 4: Simplify right side
    18,690.08x = 196,281,159.96
  5. Step 5: Solve for x
    x = 196,281,159.96/18,690.08
  6. Step 6: Final answer
    x = 10,501.89

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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.