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Finding the Fourth Proportional to 20,486.88, 30,710.88 and 7,332.48

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Solution

The fourth proportional to 20,486.88, 30,710.88 and 7,332.48 is: 10,991.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.88 : 30,710.88 = 7,332.48 : x
  2. Step 2: Convert to fraction form
    20,486.88/30,710.88 = 7,332.48/x
  3. Step 3: Cross multiply
    20,486.88x = 30,710.88 × 7,332.48
  4. Step 4: Simplify right side
    20,486.88x = 225,186,913.38
  5. Step 5: Solve for x
    x = 225,186,913.38/20,486.88
  6. Step 6: Final answer
    x = 10,991.76

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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.