Home / 21,633.20-29,861.16-13,140.08

Finding the Fourth Proportional to 21,633.20, 29,861.16 and 13,140.08

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Solution

The fourth proportional to 21,633.20, 29,861.16 and 13,140.08 is: 18,137.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,633.20 : 29,861.16 = 13,140.08 : x
  2. Step 2: Convert to fraction form
    21,633.20/29,861.16 = 13,140.08/x
  3. Step 3: Cross multiply
    21,633.20x = 29,861.16 × 13,140.08
  4. Step 4: Simplify right side
    21,633.20x = 392,378,031.29
  5. Step 5: Solve for x
    x = 392,378,031.29/21,633.20
  6. Step 6: Final answer
    x = 18,137.77

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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.