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Finding the Fourth Proportional to 7,000.65, 9,808.20 and 7,000.65

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Solution

The fourth proportional to 7,000.65, 9,808.20 and 7,000.65 is: 9,808.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,000.65 : 9,808.20 = 7,000.65 : x
  2. Step 2: Convert to fraction form
    7,000.65/9,808.20 = 7,000.65/x
  3. Step 3: Cross multiply
    7,000.65x = 9,808.20 × 7,000.65
  4. Step 4: Simplify right side
    7,000.65x = 68,663,775.33
  5. Step 5: Solve for x
    x = 68,663,775.33/7,000.65
  6. Step 6: Final answer
    x = 9,808.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.