Home / 21,287.68-29,377-11,856.24

Finding the Fourth Proportional to 21,287.68, 29,377 and 11,856.24

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Solution

The fourth proportional to 21,287.68, 29,377 and 11,856.24 is: 16,361.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.68 : 29,377 = 11,856.24 : x
  2. Step 2: Convert to fraction form
    21,287.68/29,377 = 11,856.24/x
  3. Step 3: Cross multiply
    21,287.68x = 29,377 × 11,856.24
  4. Step 4: Simplify right side
    21,287.68x = 348,300,762.48
  5. Step 5: Solve for x
    x = 348,300,762.48/21,287.68
  6. Step 6: Final answer
    x = 16,361.61

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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.