Home / 13,156.20-19,748.70-8,231.40

Finding the Fourth Proportional to 13,156.20, 19,748.70 and 8,231.40

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Solution

The fourth proportional to 13,156.20, 19,748.70 and 8,231.40 is: 12,356.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.20 : 19,748.70 = 8,231.40 : x
  2. Step 2: Convert to fraction form
    13,156.20/19,748.70 = 8,231.40/x
  3. Step 3: Cross multiply
    13,156.20x = 19,748.70 × 8,231.40
  4. Step 4: Simplify right side
    13,156.20x = 162,559,449.18
  5. Step 5: Solve for x
    x = 162,559,449.18/13,156.20
  6. Step 6: Final answer
    x = 12,356.11

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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.