Home / 28,189.02-38,927-21,103.14

Finding the Fourth Proportional to 28,189.02, 38,927 and 21,103.14

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Solution

The fourth proportional to 28,189.02, 38,927 and 21,103.14 is: 29,141.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.02 : 38,927 = 21,103.14 : x
  2. Step 2: Convert to fraction form
    28,189.02/38,927 = 21,103.14/x
  3. Step 3: Cross multiply
    28,189.02x = 38,927 × 21,103.14
  4. Step 4: Simplify right side
    28,189.02x = 821,481,930.78
  5. Step 5: Solve for x
    x = 821,481,930.78/28,189.02
  6. Step 6: Final answer
    x = 29,141.91

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Half scale
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Double scale
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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.