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Finding the Fourth Proportional to 15,012.74, 20,714.73 and 9,421.22

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Solution

The fourth proportional to 15,012.74, 20,714.73 and 9,421.22 is: 12,999.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.74 : 20,714.73 = 9,421.22 : x
  2. Step 2: Convert to fraction form
    15,012.74/20,714.73 = 9,421.22/x
  3. Step 3: Cross multiply
    15,012.74x = 20,714.73 × 9,421.22
  4. Step 4: Simplify right side
    15,012.74x = 195,158,028.57
  5. Step 5: Solve for x
    x = 195,158,028.57/15,012.74
  6. Step 6: Final answer
    x = 12,999.49

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.