Home / 21,051.30-31,613.40-11,209.80

Finding the Fourth Proportional to 21,051.30, 31,613.40 and 11,209.80

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Solution

The fourth proportional to 21,051.30, 31,613.40 and 11,209.80 is: 16,834.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.30 : 31,613.40 = 11,209.80 : x
  2. Step 2: Convert to fraction form
    21,051.30/31,613.40 = 11,209.80/x
  3. Step 3: Cross multiply
    21,051.30x = 31,613.40 × 11,209.80
  4. Step 4: Simplify right side
    21,051.30x = 354,379,891.32
  5. Step 5: Solve for x
    x = 354,379,891.32/21,051.30
  6. Step 6: Final answer
    x = 16,834.11

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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.