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Finding the Fourth Proportional to 21,103.66, 31,657.13 and 7,063.72

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Solution

The fourth proportional to 21,103.66, 31,657.13 and 7,063.72 is: 10,596.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.66 : 31,657.13 = 7,063.72 : x
  2. Step 2: Convert to fraction form
    21,103.66/31,657.13 = 7,063.72/x
  3. Step 3: Cross multiply
    21,103.66x = 31,657.13 × 7,063.72
  4. Step 4: Simplify right side
    21,103.66x = 223,617,192.42
  5. Step 5: Solve for x
    x = 223,617,192.42/21,103.66
  6. Step 6: Final answer
    x = 10,596.14

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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.