Home / 21,163.10-29,197.35-12,665.45

Finding the Fourth Proportional to 21,163.10, 29,197.35 and 12,665.45

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Solution

The fourth proportional to 21,163.10, 29,197.35 and 12,665.45 is: 17,473.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.10 : 29,197.35 = 12,665.45 : x
  2. Step 2: Convert to fraction form
    21,163.10/29,197.35 = 12,665.45/x
  3. Step 3: Cross multiply
    21,163.10x = 29,197.35 × 12,665.45
  4. Step 4: Simplify right side
    21,163.10x = 369,797,649.55
  5. Step 5: Solve for x
    x = 369,797,649.55/21,163.10
  6. Step 6: Final answer
    x = 17,473.70

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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.