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Finding the Fourth Proportional to 12,075.81, 16,647.12 and 8,479.81

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Solution

The fourth proportional to 12,075.81, 16,647.12 and 8,479.81 is: 11,689.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,075.81 : 16,647.12 = 8,479.81 : x
  2. Step 2: Convert to fraction form
    12,075.81/16,647.12 = 8,479.81/x
  3. Step 3: Cross multiply
    12,075.81x = 16,647.12 × 8,479.81
  4. Step 4: Simplify right side
    12,075.81x = 141,164,482.28
  5. Step 5: Solve for x
    x = 141,164,482.28/12,075.81
  6. Step 6: Final answer
    x = 11,689.86

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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.