Home / 20,888.28-31,322.70-9,187.83

Finding the Fourth Proportional to 20,888.28, 31,322.70 and 9,187.83

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Solution

The fourth proportional to 20,888.28, 31,322.70 and 9,187.83 is: 13,777.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.28 : 31,322.70 = 9,187.83 : x
  2. Step 2: Convert to fraction form
    20,888.28/31,322.70 = 9,187.83/x
  3. Step 3: Cross multiply
    20,888.28x = 31,322.70 × 9,187.83
  4. Step 4: Simplify right side
    20,888.28x = 287,787,642.74
  5. Step 5: Solve for x
    x = 287,787,642.74/20,888.28
  6. Step 6: Final answer
    x = 13,777.47

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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.