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Finding the Fourth Proportional to 20,514.61, 30,776.78 and 7,368.31

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Solution

The fourth proportional to 20,514.61, 30,776.78 and 7,368.31 is: 11,054.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,514.61 : 30,776.78 = 7,368.31 : x
  2. Step 2: Convert to fraction form
    20,514.61/30,776.78 = 7,368.31/x
  3. Step 3: Cross multiply
    20,514.61x = 30,776.78 × 7,368.31
  4. Step 4: Simplify right side
    20,514.61x = 226,772,855.84
  5. Step 5: Solve for x
    x = 226,772,855.84/20,514.61
  6. Step 6: Final answer
    x = 11,054.21

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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.