Home / 20,379.04-28,136.80-12,733.92

Finding the Fourth Proportional to 20,379.04, 28,136.80 and 12,733.92

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Solution

The fourth proportional to 20,379.04, 28,136.80 and 12,733.92 is: 17,581.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.04 : 28,136.80 = 12,733.92 : x
  2. Step 2: Convert to fraction form
    20,379.04/28,136.80 = 12,733.92/x
  3. Step 3: Cross multiply
    20,379.04x = 28,136.80 × 12,733.92
  4. Step 4: Simplify right side
    20,379.04x = 358,291,760.26
  5. Step 5: Solve for x
    x = 358,291,760.26/20,379.04
  6. Step 6: Final answer
    x = 17,581.39

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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.