Home / 21,335.78-29,445.04-11,905.76

Finding the Fourth Proportional to 21,335.78, 29,445.04 and 11,905.76

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Solution

The fourth proportional to 21,335.78, 29,445.04 and 11,905.76 is: 16,430.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.78 : 29,445.04 = 11,905.76 : x
  2. Step 2: Convert to fraction form
    21,335.78/29,445.04 = 11,905.76/x
  3. Step 3: Cross multiply
    21,335.78x = 29,445.04 × 11,905.76
  4. Step 4: Simplify right side
    21,335.78x = 350,565,579.43
  5. Step 5: Solve for x
    x = 350,565,579.43/21,335.78
  6. Step 6: Final answer
    x = 16,430.88

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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.