Home / 21,261.51-31,896.60-7,420.23

Finding the Fourth Proportional to 21,261.51, 31,896.60 and 7,420.23

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Solution

The fourth proportional to 21,261.51, 31,896.60 and 7,420.23 is: 11,131.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,261.51 : 31,896.60 = 7,420.23 : x
  2. Step 2: Convert to fraction form
    21,261.51/31,896.60 = 7,420.23/x
  3. Step 3: Cross multiply
    21,261.51x = 31,896.60 × 7,420.23
  4. Step 4: Simplify right side
    21,261.51x = 236,680,108.22
  5. Step 5: Solve for x
    x = 236,680,108.22/21,261.51
  6. Step 6: Final answer
    x = 11,131.86

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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.