Home / 21,255.30-29,330.37-12,757.32

Finding the Fourth Proportional to 21,255.30, 29,330.37 and 12,757.32

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Solution

The fourth proportional to 21,255.30, 29,330.37 and 12,757.32 is: 17,603.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.30 : 29,330.37 = 12,757.32 : x
  2. Step 2: Convert to fraction form
    21,255.30/29,330.37 = 12,757.32/x
  3. Step 3: Cross multiply
    21,255.30x = 29,330.37 × 12,757.32
  4. Step 4: Simplify right side
    21,255.30x = 374,176,915.81
  5. Step 5: Solve for x
    x = 374,176,915.81/21,255.30
  6. Step 6: Final answer
    x = 17,603.93

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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.