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Finding the Fourth Proportional to 6,510.80, 8,985.80 and 3,992.46

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Solution

The fourth proportional to 6,510.80, 8,985.80 and 3,992.46 is: 5,510.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,510.80 : 8,985.80 = 3,992.46 : x
  2. Step 2: Convert to fraction form
    6,510.80/8,985.80 = 3,992.46/x
  3. Step 3: Cross multiply
    6,510.80x = 8,985.80 × 3,992.46
  4. Step 4: Simplify right side
    6,510.80x = 35,875,427.11
  5. Step 5: Solve for x
    x = 35,875,427.11/6,510.80
  6. Step 6: Final answer
    x = 5,510.15

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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.