Home / 21,465.64-29,622.59-11,905.20

Finding the Fourth Proportional to 21,465.64, 29,622.59 and 11,905.20

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Solution

The fourth proportional to 21,465.64, 29,622.59 and 11,905.20 is: 16,429.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,465.64 : 29,622.59 = 11,905.20 : x
  2. Step 2: Convert to fraction form
    21,465.64/29,622.59 = 11,905.20/x
  3. Step 3: Cross multiply
    21,465.64x = 29,622.59 × 11,905.20
  4. Step 4: Simplify right side
    21,465.64x = 352,663,020.44
  5. Step 5: Solve for x
    x = 352,663,020.44/21,465.64
  6. Step 6: Final answer
    x = 16,429.19

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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.