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Finding the Fourth Proportional to 18,802.10, 28,206.40 and 7,714.82

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Solution

The fourth proportional to 18,802.10, 28,206.40 and 7,714.82 is: 11,573.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,802.10 : 28,206.40 = 7,714.82 : x
  2. Step 2: Convert to fraction form
    18,802.10/28,206.40 = 7,714.82/x
  3. Step 3: Cross multiply
    18,802.10x = 28,206.40 × 7,714.82
  4. Step 4: Simplify right side
    18,802.10x = 217,607,298.85
  5. Step 5: Solve for x
    x = 217,607,298.85/18,802.10
  6. Step 6: Final answer
    x = 11,573.56

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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.