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Finding the Fourth Proportional to 12,328.60, 18,482.10 and 7,400.20

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Solution

The fourth proportional to 12,328.60, 18,482.10 and 7,400.20 is: 11,093.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,328.60 : 18,482.10 = 7,400.20 : x
  2. Step 2: Convert to fraction form
    12,328.60/18,482.10 = 7,400.20/x
  3. Step 3: Cross multiply
    12,328.60x = 18,482.10 × 7,400.20
  4. Step 4: Simplify right side
    12,328.60x = 136,771,236.42
  5. Step 5: Solve for x
    x = 136,771,236.42/12,328.60
  6. Step 6: Final answer
    x = 11,093.82

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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.