Home / 21,188.40-29,232.60-18,012.72

Finding the Fourth Proportional to 21,188.40, 29,232.60 and 18,012.72

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Solution

The fourth proportional to 21,188.40, 29,232.60 and 18,012.72 is: 24,851.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.40 : 29,232.60 = 18,012.72 : x
  2. Step 2: Convert to fraction form
    21,188.40/29,232.60 = 18,012.72/x
  3. Step 3: Cross multiply
    21,188.40x = 29,232.60 × 18,012.72
  4. Step 4: Simplify right side
    21,188.40x = 526,558,638.67
  5. Step 5: Solve for x
    x = 526,558,638.67/21,188.40
  6. Step 6: Final answer
    x = 24,851.27

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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.