Home / 12,428.40-18,664.20-12,039.60

Finding the Fourth Proportional to 12,428.40, 18,664.20 and 12,039.60

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Solution

The fourth proportional to 12,428.40, 18,664.20 and 12,039.60 is: 18,080.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.40 : 18,664.20 = 12,039.60 : x
  2. Step 2: Convert to fraction form
    12,428.40/18,664.20 = 12,039.60/x
  3. Step 3: Cross multiply
    12,428.40x = 18,664.20 × 12,039.60
  4. Step 4: Simplify right side
    12,428.40x = 224,709,502.32
  5. Step 5: Solve for x
    x = 224,709,502.32/12,428.40
  6. Step 6: Final answer
    x = 18,080.32

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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.