Home / 20,521.36-28,308.20-12,136.24

Finding the Fourth Proportional to 20,521.36, 28,308.20 and 12,136.24

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Solution

The fourth proportional to 20,521.36, 28,308.20 and 12,136.24 is: 16,741.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.36 : 28,308.20 = 12,136.24 : x
  2. Step 2: Convert to fraction form
    20,521.36/28,308.20 = 12,136.24/x
  3. Step 3: Cross multiply
    20,521.36x = 28,308.20 × 12,136.24
  4. Step 4: Simplify right side
    20,521.36x = 343,555,109.17
  5. Step 5: Solve for x
    x = 343,555,109.17/20,521.36
  6. Step 6: Final answer
    x = 16,741.34

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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.