Home / 21,272.40-31,908.60-7,418.16

Finding the Fourth Proportional to 21,272.40, 31,908.60 and 7,418.16

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Solution

The fourth proportional to 21,272.40, 31,908.60 and 7,418.16 is: 11,127.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.40 : 31,908.60 = 7,418.16 : x
  2. Step 2: Convert to fraction form
    21,272.40/31,908.60 = 7,418.16/x
  3. Step 3: Cross multiply
    21,272.40x = 31,908.60 × 7,418.16
  4. Step 4: Simplify right side
    21,272.40x = 236,703,100.18
  5. Step 5: Solve for x
    x = 236,703,100.18/21,272.40
  6. Step 6: Final answer
    x = 11,127.24

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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.