Home / 21,039.57-31,555.71-6,999.84

Finding the Fourth Proportional to 21,039.57, 31,555.71 and 6,999.84

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Solution

The fourth proportional to 21,039.57, 31,555.71 and 6,999.84 is: 10,498.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.57 : 31,555.71 = 6,999.84 : x
  2. Step 2: Convert to fraction form
    21,039.57/31,555.71 = 6,999.84/x
  3. Step 3: Cross multiply
    21,039.57x = 31,555.71 × 6,999.84
  4. Step 4: Simplify right side
    21,039.57x = 220,884,921.09
  5. Step 5: Solve for x
    x = 220,884,921.09/21,039.57
  6. Step 6: Final answer
    x = 10,498.55

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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.