Home / 21,260.40-31,873.32-7,419.12

Finding the Fourth Proportional to 21,260.40, 31,873.32 and 7,419.12

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Solution

The fourth proportional to 21,260.40, 31,873.32 and 7,419.12 is: 11,122.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,260.40 : 31,873.32 = 7,419.12 : x
  2. Step 2: Convert to fraction form
    21,260.40/31,873.32 = 7,419.12/x
  3. Step 3: Cross multiply
    21,260.40x = 31,873.32 × 7,419.12
  4. Step 4: Simplify right side
    21,260.40x = 236,471,985.88
  5. Step 5: Solve for x
    x = 236,471,985.88/21,260.40
  6. Step 6: Final answer
    x = 11,122.65

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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.