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Finding the Fourth Proportional to 8,866.64, 13,362.12 and 7,990.13

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Solution

The fourth proportional to 8,866.64, 13,362.12 and 7,990.13 is: 12,041.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,866.64 : 13,362.12 = 7,990.13 : x
  2. Step 2: Convert to fraction form
    8,866.64/13,362.12 = 7,990.13/x
  3. Step 3: Cross multiply
    8,866.64x = 13,362.12 × 7,990.13
  4. Step 4: Simplify right side
    8,866.64x = 106,765,075.88
  5. Step 5: Solve for x
    x = 106,765,075.88/8,866.64
  6. Step 6: Final answer
    x = 12,041.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.