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Finding the Fourth Proportional to 7,776.61, 10,719.50 and 6,515.44

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Solution

The fourth proportional to 7,776.61, 10,719.50 and 6,515.44 is: 8,981.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,776.61 : 10,719.50 = 6,515.44 : x
  2. Step 2: Convert to fraction form
    7,776.61/10,719.50 = 6,515.44/x
  3. Step 3: Cross multiply
    7,776.61x = 10,719.50 × 6,515.44
  4. Step 4: Simplify right side
    7,776.61x = 69,842,199.70
  5. Step 5: Solve for x
    x = 69,842,199.70/7,776.61
  6. Step 6: Final answer
    x = 8,981.06

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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.