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Finding the Fourth Proportional to 9,211.68, 12,712.14 and 5,020.20

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Solution

The fourth proportional to 9,211.68, 12,712.14 and 5,020.20 is: 6,927.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,211.68 : 12,712.14 = 5,020.20 : x
  2. Step 2: Convert to fraction form
    9,211.68/12,712.14 = 5,020.20/x
  3. Step 3: Cross multiply
    9,211.68x = 12,712.14 × 5,020.20
  4. Step 4: Simplify right side
    9,211.68x = 63,817,485.23
  5. Step 5: Solve for x
    x = 63,817,485.23/9,211.68
  6. Step 6: Final answer
    x = 6,927.89

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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.