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Finding the Fourth Proportional to 13,923.62, 20,888.68 and 4,689.62

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Solution

The fourth proportional to 13,923.62, 20,888.68 and 4,689.62 is: 7,035.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,923.62 : 20,888.68 = 4,689.62 : x
  2. Step 2: Convert to fraction form
    13,923.62/20,888.68 = 4,689.62/x
  3. Step 3: Cross multiply
    13,923.62x = 20,888.68 × 4,689.62
  4. Step 4: Simplify right side
    13,923.62x = 97,959,971.50
  5. Step 5: Solve for x
    x = 97,959,971.50/13,923.62
  6. Step 6: Final answer
    x = 7,035.52

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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.