Home / 12,312.17-18,464.39-3,990.27

Finding the Fourth Proportional to 12,312.17, 18,464.39 and 3,990.27

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Solution

The fourth proportional to 12,312.17, 18,464.39 and 3,990.27 is: 5,984.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312.17 : 18,464.39 = 3,990.27 : x
  2. Step 2: Convert to fraction form
    12,312.17/18,464.39 = 3,990.27/x
  3. Step 3: Cross multiply
    12,312.17x = 18,464.39 × 3,990.27
  4. Step 4: Simplify right side
    12,312.17x = 73,677,901.49
  5. Step 5: Solve for x
    x = 73,677,901.49/12,312.17
  6. Step 6: Final answer
    x = 5,984.15

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Double scale
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Similar ratio
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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.