Home / 28,130.22-38,816.79-16,191.18

Finding the Fourth Proportional to 28,130.22, 38,816.79 and 16,191.18

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Solution

The fourth proportional to 28,130.22, 38,816.79 and 16,191.18 is: 22,342.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.22 : 38,816.79 = 16,191.18 : x
  2. Step 2: Convert to fraction form
    28,130.22/38,816.79 = 16,191.18/x
  3. Step 3: Cross multiply
    28,130.22x = 38,816.79 × 16,191.18
  4. Step 4: Simplify right side
    28,130.22x = 628,489,633.91
  5. Step 5: Solve for x
    x = 628,489,633.91/28,130.22
  6. Step 6: Final answer
    x = 22,342.15

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Double scale
Find fourth proportional to 28,131.22, 38,818.17 and 16,192.18
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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.