Home / 21,088.20-29,099.70-11,655.24

Finding the Fourth Proportional to 21,088.20, 29,099.70 and 11,655.24

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Solution

The fourth proportional to 21,088.20, 29,099.70 and 11,655.24 is: 16,083.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,088.20 : 29,099.70 = 11,655.24 : x
  2. Step 2: Convert to fraction form
    21,088.20/29,099.70 = 11,655.24/x
  3. Step 3: Cross multiply
    21,088.20x = 29,099.70 × 11,655.24
  4. Step 4: Simplify right side
    21,088.20x = 339,163,987.43
  5. Step 5: Solve for x
    x = 339,163,987.43/21,088.20
  6. Step 6: Final answer
    x = 16,083.12

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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.