Home / 21,127.32-31,722.12-11,785.59

Finding the Fourth Proportional to 21,127.32, 31,722.12 and 11,785.59

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Solution

The fourth proportional to 21,127.32, 31,722.12 and 11,785.59 is: 17,695.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.32 : 31,722.12 = 11,785.59 : x
  2. Step 2: Convert to fraction form
    21,127.32/31,722.12 = 11,785.59/x
  3. Step 3: Cross multiply
    21,127.32x = 31,722.12 × 11,785.59
  4. Step 4: Simplify right side
    21,127.32x = 373,863,900.25
  5. Step 5: Solve for x
    x = 373,863,900.25/21,127.32
  6. Step 6: Final answer
    x = 17,695.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.