Home / 13,613.77-20,421.57-4,255.23

Finding the Fourth Proportional to 13,613.77, 20,421.57 and 4,255.23

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Solution

The fourth proportional to 13,613.77, 20,421.57 and 4,255.23 is: 6,383.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.77 : 20,421.57 = 4,255.23 : x
  2. Step 2: Convert to fraction form
    13,613.77/20,421.57 = 4,255.23/x
  3. Step 3: Cross multiply
    13,613.77x = 20,421.57 × 4,255.23
  4. Step 4: Simplify right side
    13,613.77x = 86,898,545.91
  5. Step 5: Solve for x
    x = 86,898,545.91/13,613.77
  6. Step 6: Final answer
    x = 6,383.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.