Home / 13,115.40-19,640.70-9,810.60

Finding the Fourth Proportional to 13,115.40, 19,640.70 and 9,810.60

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Solution

The fourth proportional to 13,115.40, 19,640.70 and 9,810.60 is: 14,691.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.40 : 19,640.70 = 9,810.60 : x
  2. Step 2: Convert to fraction form
    13,115.40/19,640.70 = 9,810.60/x
  3. Step 3: Cross multiply
    13,115.40x = 19,640.70 × 9,810.60
  4. Step 4: Simplify right side
    13,115.40x = 192,687,051.42
  5. Step 5: Solve for x
    x = 192,687,051.42/13,115.40
  6. Step 6: Final answer
    x = 14,691.66

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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.