Home / 21,272.50-29,356.05-11,840.86

Finding the Fourth Proportional to 21,272.50, 29,356.05 and 11,840.86

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Solution

The fourth proportional to 21,272.50, 29,356.05 and 11,840.86 is: 16,340.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.50 : 29,356.05 = 11,840.86 : x
  2. Step 2: Convert to fraction form
    21,272.50/29,356.05 = 11,840.86/x
  3. Step 3: Cross multiply
    21,272.50x = 29,356.05 × 11,840.86
  4. Step 4: Simplify right side
    21,272.50x = 347,600,878.20
  5. Step 5: Solve for x
    x = 347,600,878.20/21,272.50
  6. Step 6: Final answer
    x = 16,340.39

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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.