Home / 21,089.32-31,608.06-11,228.20

Finding the Fourth Proportional to 21,089.32, 31,608.06 and 11,228.20

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Solution

The fourth proportional to 21,089.32, 31,608.06 and 11,228.20 is: 16,828.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.32 : 31,608.06 = 11,228.20 : x
  2. Step 2: Convert to fraction form
    21,089.32/31,608.06 = 11,228.20/x
  3. Step 3: Cross multiply
    21,089.32x = 31,608.06 × 11,228.20
  4. Step 4: Simplify right side
    21,089.32x = 354,901,619.29
  5. Step 5: Solve for x
    x = 354,901,619.29/21,089.32
  6. Step 6: Final answer
    x = 16,828.50

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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.