Home / 12,683.42-17,482.88-9,990.36

Finding the Fourth Proportional to 12,683.42, 17,482.88 and 9,990.36

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Solution

The fourth proportional to 12,683.42, 17,482.88 and 9,990.36 is: 13,770.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,683.42 : 17,482.88 = 9,990.36 : x
  2. Step 2: Convert to fraction form
    12,683.42/17,482.88 = 9,990.36/x
  3. Step 3: Cross multiply
    12,683.42x = 17,482.88 × 9,990.36
  4. Step 4: Simplify right side
    12,683.42x = 174,660,265.04
  5. Step 5: Solve for x
    x = 174,660,265.04/12,683.42
  6. Step 6: Final answer
    x = 13,770.75

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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.