Home / 21,228.32-29,308.20-13,677.32

Finding the Fourth Proportional to 21,228.32, 29,308.20 and 13,677.32

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Solution

The fourth proportional to 21,228.32, 29,308.20 and 13,677.32 is: 18,883.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.32 : 29,308.20 = 13,677.32 : x
  2. Step 2: Convert to fraction form
    21,228.32/29,308.20 = 13,677.32/x
  3. Step 3: Cross multiply
    21,228.32x = 29,308.20 × 13,677.32
  4. Step 4: Simplify right side
    21,228.32x = 400,857,630.02
  5. Step 5: Solve for x
    x = 400,857,630.02/21,228.32
  6. Step 6: Final answer
    x = 18,883.15

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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.