Home / 15,287.70-21,101.40-9,003.72

Finding the Fourth Proportional to 15,287.70, 21,101.40 and 9,003.72

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Solution

The fourth proportional to 15,287.70, 21,101.40 and 9,003.72 is: 12,427.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,287.70 : 21,101.40 = 9,003.72 : x
  2. Step 2: Convert to fraction form
    15,287.70/21,101.40 = 9,003.72/x
  3. Step 3: Cross multiply
    15,287.70x = 21,101.40 × 9,003.72
  4. Step 4: Simplify right side
    15,287.70x = 189,991,097.21
  5. Step 5: Solve for x
    x = 189,991,097.21/15,287.70
  6. Step 6: Final answer
    x = 12,427.71

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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.