Home / 21,507.10-29,679.20-11,946.68

Finding the Fourth Proportional to 21,507.10, 29,679.20 and 11,946.68

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Solution

The fourth proportional to 21,507.10, 29,679.20 and 11,946.68 is: 16,486.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,507.10 : 29,679.20 = 11,946.68 : x
  2. Step 2: Convert to fraction form
    21,507.10/29,679.20 = 11,946.68/x
  3. Step 3: Cross multiply
    21,507.10x = 29,679.20 × 11,946.68
  4. Step 4: Simplify right side
    21,507.10x = 354,567,905.06
  5. Step 5: Solve for x
    x = 354,567,905.06/21,507.10
  6. Step 6: Final answer
    x = 16,486.09

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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.