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Finding the Fourth Proportional to 20,655.81, 30,982.10 and 7,511.13

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Solution

The fourth proportional to 20,655.81, 30,982.10 and 7,511.13 is: 11,266.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.81 : 30,982.10 = 7,511.13 : x
  2. Step 2: Convert to fraction form
    20,655.81/30,982.10 = 7,511.13/x
  3. Step 3: Cross multiply
    20,655.81x = 30,982.10 × 7,511.13
  4. Step 4: Simplify right side
    20,655.81x = 232,710,543.22
  5. Step 5: Solve for x
    x = 232,710,543.22/20,655.81
  6. Step 6: Final answer
    x = 11,266.11

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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.