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Finding the Fourth Proportional to 7,206.88, 10,813.68 and 7,090.40

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Solution

The fourth proportional to 7,206.88, 10,813.68 and 7,090.40 is: 10,638.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,206.88 : 10,813.68 = 7,090.40 : x
  2. Step 2: Convert to fraction form
    7,206.88/10,813.68 = 7,090.40/x
  3. Step 3: Cross multiply
    7,206.88x = 10,813.68 × 7,090.40
  4. Step 4: Simplify right side
    7,206.88x = 76,673,316.67
  5. Step 5: Solve for x
    x = 76,673,316.67/7,206.88
  6. Step 6: Final answer
    x = 10,638.91

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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.