Home / 21,216.91-29,280.27-11,785.48

Finding the Fourth Proportional to 21,216.91, 29,280.27 and 11,785.48

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Solution

The fourth proportional to 21,216.91, 29,280.27 and 11,785.48 is: 16,264.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.91 : 29,280.27 = 11,785.48 : x
  2. Step 2: Convert to fraction form
    21,216.91/29,280.27 = 11,785.48/x
  3. Step 3: Cross multiply
    21,216.91x = 29,280.27 × 11,785.48
  4. Step 4: Simplify right side
    21,216.91x = 345,081,831.15
  5. Step 5: Solve for x
    x = 345,081,831.15/21,216.91
  6. Step 6: Final answer
    x = 16,264.47

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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.