Home / 21,086.28-31,618.80-7,041.36

Finding the Fourth Proportional to 21,086.28, 31,618.80 and 7,041.36

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Solution

The fourth proportional to 21,086.28, 31,618.80 and 7,041.36 is: 10,558.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.28 : 31,618.80 = 7,041.36 : x
  2. Step 2: Convert to fraction form
    21,086.28/31,618.80 = 7,041.36/x
  3. Step 3: Cross multiply
    21,086.28x = 31,618.80 × 7,041.36
  4. Step 4: Simplify right side
    21,086.28x = 222,639,353.57
  5. Step 5: Solve for x
    x = 222,639,353.57/21,086.28
  6. Step 6: Final answer
    x = 10,558.49

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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.