Home / 21,459.82-29,616.28-11,900.64

Finding the Fourth Proportional to 21,459.82, 29,616.28 and 11,900.64

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Solution

The fourth proportional to 21,459.82, 29,616.28 and 11,900.64 is: 16,423.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459.82 : 29,616.28 = 11,900.64 : x
  2. Step 2: Convert to fraction form
    21,459.82/29,616.28 = 11,900.64/x
  3. Step 3: Cross multiply
    21,459.82x = 29,616.28 × 11,900.64
  4. Step 4: Simplify right side
    21,459.82x = 352,452,686.42
  5. Step 5: Solve for x
    x = 352,452,686.42/21,459.82
  6. Step 6: Final answer
    x = 16,423.84

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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.