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Finding the Fourth Proportional to 20,574.84, 30,862.28 and 4,992.47

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Solution

The fourth proportional to 20,574.84, 30,862.28 and 4,992.47 is: 7,488.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.84 : 30,862.28 = 4,992.47 : x
  2. Step 2: Convert to fraction form
    20,574.84/30,862.28 = 4,992.47/x
  3. Step 3: Cross multiply
    20,574.84x = 30,862.28 × 4,992.47
  4. Step 4: Simplify right side
    20,574.84x = 154,078,980.93
  5. Step 5: Solve for x
    x = 154,078,980.93/20,574.84
  6. Step 6: Final answer
    x = 7,488.71

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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.