Home / 31,264.64-43,139.20-21,201.28

Finding the Fourth Proportional to 31,264.64, 43,139.20 and 21,201.28

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Solution

The fourth proportional to 31,264.64, 43,139.20 and 21,201.28 is: 29,253.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,264.64 : 43,139.20 = 21,201.28 : x
  2. Step 2: Convert to fraction form
    31,264.64/43,139.20 = 21,201.28/x
  3. Step 3: Cross multiply
    31,264.64x = 43,139.20 × 21,201.28
  4. Step 4: Simplify right side
    31,264.64x = 914,606,258.18
  5. Step 5: Solve for x
    x = 914,606,258.18/31,264.64
  6. Step 6: Final answer
    x = 29,253.70

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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.