Home / 21,285.76-29,374.40-11,856.20

Finding the Fourth Proportional to 21,285.76, 29,374.40 and 11,856.20

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Solution

The fourth proportional to 21,285.76, 29,374.40 and 11,856.20 is: 16,361.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.76 : 29,374.40 = 11,856.20 : x
  2. Step 2: Convert to fraction form
    21,285.76/29,374.40 = 11,856.20/x
  3. Step 3: Cross multiply
    21,285.76x = 29,374.40 × 11,856.20
  4. Step 4: Simplify right side
    21,285.76x = 348,268,761.28
  5. Step 5: Solve for x
    x = 348,268,761.28/21,285.76
  6. Step 6: Final answer
    x = 16,361.58

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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.