Home / 20,291.55-28,002.30-11,339.06

Finding the Fourth Proportional to 20,291.55, 28,002.30 and 11,339.06

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Solution

The fourth proportional to 20,291.55, 28,002.30 and 11,339.06 is: 15,647.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.55 : 28,002.30 = 11,339.06 : x
  2. Step 2: Convert to fraction form
    20,291.55/28,002.30 = 11,339.06/x
  3. Step 3: Cross multiply
    20,291.55x = 28,002.30 × 11,339.06
  4. Step 4: Simplify right side
    20,291.55x = 317,519,668.26
  5. Step 5: Solve for x
    x = 317,519,668.26/20,291.55
  6. Step 6: Final answer
    x = 15,647.87

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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.