Home / 12,071.40-18,128.70-8,788.20

Finding the Fourth Proportional to 12,071.40, 18,128.70 and 8,788.20

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Solution

The fourth proportional to 12,071.40, 18,128.70 and 8,788.20 is: 13,198.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,071.40 : 18,128.70 = 8,788.20 : x
  2. Step 2: Convert to fraction form
    12,071.40/18,128.70 = 8,788.20/x
  3. Step 3: Cross multiply
    12,071.40x = 18,128.70 × 8,788.20
  4. Step 4: Simplify right side
    12,071.40x = 159,318,641.34
  5. Step 5: Solve for x
    x = 159,318,641.34/12,071.40
  6. Step 6: Final answer
    x = 13,198.03

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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.