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Finding the Fourth Proportional to 13,599.40, 20,411.10 and 8,045.80

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Solution

The fourth proportional to 13,599.40, 20,411.10 and 8,045.80 is: 12,075.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,599.40 : 20,411.10 = 8,045.80 : x
  2. Step 2: Convert to fraction form
    13,599.40/20,411.10 = 8,045.80/x
  3. Step 3: Cross multiply
    13,599.40x = 20,411.10 × 8,045.80
  4. Step 4: Simplify right side
    13,599.40x = 164,223,628.38
  5. Step 5: Solve for x
    x = 164,223,628.38/13,599.40
  6. Step 6: Final answer
    x = 12,075.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.