Home / 21,210.14-31,804.34-11,220.28

Finding the Fourth Proportional to 21,210.14, 31,804.34 and 11,220.28

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Solution

The fourth proportional to 21,210.14, 31,804.34 and 11,220.28 is: 16,824.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.14 : 31,804.34 = 11,220.28 : x
  2. Step 2: Convert to fraction form
    21,210.14/31,804.34 = 11,220.28/x
  3. Step 3: Cross multiply
    21,210.14x = 31,804.34 × 11,220.28
  4. Step 4: Simplify right side
    21,210.14x = 356,853,464.40
  5. Step 5: Solve for x
    x = 356,853,464.40/21,210.14
  6. Step 6: Final answer
    x = 16,824.66

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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.