Home / 12,354.40-18,531.60-8,855.20

Finding the Fourth Proportional to 12,354.40, 18,531.60 and 8,855.20

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Solution

The fourth proportional to 12,354.40, 18,531.60 and 8,855.20 is: 13,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,354.40 : 18,531.60 = 8,855.20 : x
  2. Step 2: Convert to fraction form
    12,354.40/18,531.60 = 8,855.20/x
  3. Step 3: Cross multiply
    12,354.40x = 18,531.60 × 8,855.20
  4. Step 4: Simplify right side
    12,354.40x = 164,101,024.32
  5. Step 5: Solve for x
    x = 164,101,024.32/12,354.40
  6. Step 6: Final answer
    x = 13,282.80

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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.