Home / 21,140.48-29,170.56-12,188.32

Finding the Fourth Proportional to 21,140.48, 29,170.56 and 12,188.32

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Solution

The fourth proportional to 21,140.48, 29,170.56 and 12,188.32 is: 16,817.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.48 : 29,170.56 = 12,188.32 : x
  2. Step 2: Convert to fraction form
    21,140.48/29,170.56 = 12,188.32/x
  3. Step 3: Cross multiply
    21,140.48x = 29,170.56 × 12,188.32
  4. Step 4: Simplify right side
    21,140.48x = 355,540,119.86
  5. Step 5: Solve for x
    x = 355,540,119.86/21,140.48
  6. Step 6: Final answer
    x = 16,817.98

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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.