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Finding the Fourth Proportional to 6,510.99, 8,985.35 and 3,991.65

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Solution

The fourth proportional to 6,510.99, 8,985.35 and 3,991.65 is: 5,508.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,510.99 : 8,985.35 = 3,991.65 : x
  2. Step 2: Convert to fraction form
    6,510.99/8,985.35 = 3,991.65/x
  3. Step 3: Cross multiply
    6,510.99x = 8,985.35 × 3,991.65
  4. Step 4: Simplify right side
    6,510.99x = 35,866,352.37
  5. Step 5: Solve for x
    x = 35,866,352.37/6,510.99
  6. Step 6: Final answer
    x = 5,508.59

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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.