Home / 12,211.40-18,302.70-9,129.80

Finding the Fourth Proportional to 12,211.40, 18,302.70 and 9,129.80

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Solution

The fourth proportional to 12,211.40, 18,302.70 and 9,129.80 is: 13,683.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.40 : 18,302.70 = 9,129.80 : x
  2. Step 2: Convert to fraction form
    12,211.40/18,302.70 = 9,129.80/x
  3. Step 3: Cross multiply
    12,211.40x = 18,302.70 × 9,129.80
  4. Step 4: Simplify right side
    12,211.40x = 167,099,990.46
  5. Step 5: Solve for x
    x = 167,099,990.46/12,211.40
  6. Step 6: Final answer
    x = 13,683.93

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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.