Home / 20,085.40-30,128.10-19,232.20

Finding the Fourth Proportional to 20,085.40, 30,128.10 and 19,232.20

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Solution

The fourth proportional to 20,085.40, 30,128.10 and 19,232.20 is: 28,848.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,085.40 : 30,128.10 = 19,232.20 : x
  2. Step 2: Convert to fraction form
    20,085.40/30,128.10 = 19,232.20/x
  3. Step 3: Cross multiply
    20,085.40x = 30,128.10 × 19,232.20
  4. Step 4: Simplify right side
    20,085.40x = 579,429,644.82
  5. Step 5: Solve for x
    x = 579,429,644.82/20,085.40
  6. Step 6: Final answer
    x = 28,848.30

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Double scale
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Similar ratio
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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.