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Finding the Fourth Proportional to 13,673.20, 18,870.84 and 7,706.08

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Solution

The fourth proportional to 13,673.20, 18,870.84 and 7,706.08 is: 10,635.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,673.20 : 18,870.84 = 7,706.08 : x
  2. Step 2: Convert to fraction form
    13,673.20/18,870.84 = 7,706.08/x
  3. Step 3: Cross multiply
    13,673.20x = 18,870.84 × 7,706.08
  4. Step 4: Simplify right side
    13,673.20x = 145,420,202.71
  5. Step 5: Solve for x
    x = 145,420,202.71/13,673.20
  6. Step 6: Final answer
    x = 10,635.42

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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.