Home / 15,845.66-21,861.72-9,789.42

Finding the Fourth Proportional to 15,845.66, 21,861.72 and 9,789.42

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Solution

The fourth proportional to 15,845.66, 21,861.72 and 9,789.42 is: 13,506.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,845.66 : 21,861.72 = 9,789.42 : x
  2. Step 2: Convert to fraction form
    15,845.66/21,861.72 = 9,789.42/x
  3. Step 3: Cross multiply
    15,845.66x = 21,861.72 × 9,789.42
  4. Step 4: Simplify right side
    15,845.66x = 214,013,559.00
  5. Step 5: Solve for x
    x = 214,013,559.00/15,845.66
  6. Step 6: Final answer
    x = 13,506.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.