Home / 21,489.36-29,655.20-12,057.72

Finding the Fourth Proportional to 21,489.36, 29,655.20 and 12,057.72

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Solution

The fourth proportional to 21,489.36, 29,655.20 and 12,057.72 is: 16,639.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.36 : 29,655.20 = 12,057.72 : x
  2. Step 2: Convert to fraction form
    21,489.36/29,655.20 = 12,057.72/x
  3. Step 3: Cross multiply
    21,489.36x = 29,655.20 × 12,057.72
  4. Step 4: Simplify right side
    21,489.36x = 357,574,098.14
  5. Step 5: Solve for x
    x = 357,574,098.14/21,489.36
  6. Step 6: Final answer
    x = 16,639.59

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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.