Home / 14,172.40-21,208.20-12,343.60

Finding the Fourth Proportional to 14,172.40, 21,208.20 and 12,343.60

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Solution

The fourth proportional to 14,172.40, 21,208.20 and 12,343.60 is: 18,471.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,172.40 : 21,208.20 = 12,343.60 : x
  2. Step 2: Convert to fraction form
    14,172.40/21,208.20 = 12,343.60/x
  3. Step 3: Cross multiply
    14,172.40x = 21,208.20 × 12,343.60
  4. Step 4: Simplify right side
    14,172.40x = 261,785,537.52
  5. Step 5: Solve for x
    x = 261,785,537.52/14,172.40
  6. Step 6: Final answer
    x = 18,471.50

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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.