Home / 21,140.28-31,701.78-7,286.04

Finding the Fourth Proportional to 21,140.28, 31,701.78 and 7,286.04

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Solution

The fourth proportional to 21,140.28, 31,701.78 and 7,286.04 is: 10,926.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.28 : 31,701.78 = 7,286.04 : x
  2. Step 2: Convert to fraction form
    21,140.28/31,701.78 = 7,286.04/x
  3. Step 3: Cross multiply
    21,140.28x = 31,701.78 × 7,286.04
  4. Step 4: Simplify right side
    21,140.28x = 230,980,437.15
  5. Step 5: Solve for x
    x = 230,980,437.15/21,140.28
  6. Step 6: Final answer
    x = 10,926.08

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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.