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Finding the Fourth Proportional to 20,646.65, 30,972.93 and 9,556.28

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Solution

The fourth proportional to 20,646.65, 30,972.93 and 9,556.28 is: 14,335.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,646.65 : 30,972.93 = 9,556.28 : x
  2. Step 2: Convert to fraction form
    20,646.65/30,972.93 = 9,556.28/x
  3. Step 3: Cross multiply
    20,646.65x = 30,972.93 × 9,556.28
  4. Step 4: Simplify right side
    20,646.65x = 295,985,970.70
  5. Step 5: Solve for x
    x = 295,985,970.70/20,646.65
  6. Step 6: Final answer
    x = 14,335.79

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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.