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Finding the Fourth Proportional to 6,666.84, 9,978.55 and 4,911.15

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Solution

The fourth proportional to 6,666.84, 9,978.55 and 4,911.15 is: 7,350.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,666.84 : 9,978.55 = 4,911.15 : x
  2. Step 2: Convert to fraction form
    6,666.84/9,978.55 = 4,911.15/x
  3. Step 3: Cross multiply
    6,666.84x = 9,978.55 × 4,911.15
  4. Step 4: Simplify right side
    6,666.84x = 49,006,171.18
  5. Step 5: Solve for x
    x = 49,006,171.18/6,666.84
  6. Step 6: Final answer
    x = 7,350.74

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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.