Home / 21,656.07-29,885.46-11,720.07

Finding the Fourth Proportional to 21,656.07, 29,885.46 and 11,720.07

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Solution

The fourth proportional to 21,656.07, 29,885.46 and 11,720.07 is: 16,173.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.07 : 29,885.46 = 11,720.07 : x
  2. Step 2: Convert to fraction form
    21,656.07/29,885.46 = 11,720.07/x
  3. Step 3: Cross multiply
    21,656.07x = 29,885.46 × 11,720.07
  4. Step 4: Simplify right side
    21,656.07x = 350,259,683.18
  5. Step 5: Solve for x
    x = 350,259,683.18/21,656.07
  6. Step 6: Final answer
    x = 16,173.74

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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.