Home / 20,668.59-28,521.66-11,237.15

Finding the Fourth Proportional to 20,668.59, 28,521.66 and 11,237.15

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Solution

The fourth proportional to 20,668.59, 28,521.66 and 11,237.15 is: 15,506.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.59 : 28,521.66 = 11,237.15 : x
  2. Step 2: Convert to fraction form
    20,668.59/28,521.66 = 11,237.15/x
  3. Step 3: Cross multiply
    20,668.59x = 28,521.66 × 11,237.15
  4. Step 4: Simplify right side
    20,668.59x = 320,502,029.06
  5. Step 5: Solve for x
    x = 320,502,029.06/20,668.59
  6. Step 6: Final answer
    x = 15,506.72

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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.