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Finding the Fourth Proportional to 12,140.64, 18,206.64 and 8,248.32

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Solution

The fourth proportional to 12,140.64, 18,206.64 and 8,248.32 is: 12,369.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,140.64 : 18,206.64 = 8,248.32 : x
  2. Step 2: Convert to fraction form
    12,140.64/18,206.64 = 8,248.32/x
  3. Step 3: Cross multiply
    12,140.64x = 18,206.64 × 8,248.32
  4. Step 4: Simplify right side
    12,140.64x = 150,174,192.84
  5. Step 5: Solve for x
    x = 150,174,192.84/12,140.64
  6. Step 6: Final answer
    x = 12,369.55

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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.