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Finding the Fourth Proportional to 18,000.40, 27,000.60 and 6,312.40

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Solution

The fourth proportional to 18,000.40, 27,000.60 and 6,312.40 is: 9,468.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,000.40 : 27,000.60 = 6,312.40 : x
  2. Step 2: Convert to fraction form
    18,000.40/27,000.60 = 6,312.40/x
  3. Step 3: Cross multiply
    18,000.40x = 27,000.60 × 6,312.40
  4. Step 4: Simplify right side
    18,000.40x = 170,438,587.44
  5. Step 5: Solve for x
    x = 170,438,587.44/18,000.40
  6. Step 6: Final answer
    x = 9,468.60

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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.