Home / 11,355.42-15,668.09-6,638.79

Finding the Fourth Proportional to 11,355.42, 15,668.09 and 6,638.79

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Solution

The fourth proportional to 11,355.42, 15,668.09 and 6,638.79 is: 9,160.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.42 : 15,668.09 = 6,638.79 : x
  2. Step 2: Convert to fraction form
    11,355.42/15,668.09 = 6,638.79/x
  3. Step 3: Cross multiply
    11,355.42x = 15,668.09 × 6,638.79
  4. Step 4: Simplify right side
    11,355.42x = 104,017,126.02
  5. Step 5: Solve for x
    x = 104,017,126.02/11,355.42
  6. Step 6: Final answer
    x = 9,160.13

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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.