Home / 18,931.28-28,387.04-7,075.31

Finding the Fourth Proportional to 18,931.28, 28,387.04 and 7,075.31

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Solution

The fourth proportional to 18,931.28, 28,387.04 and 7,075.31 is: 10,609.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.28 : 28,387.04 = 7,075.31 : x
  2. Step 2: Convert to fraction form
    18,931.28/28,387.04 = 7,075.31/x
  3. Step 3: Cross multiply
    18,931.28x = 28,387.04 × 7,075.31
  4. Step 4: Simplify right side
    18,931.28x = 200,846,930.67
  5. Step 5: Solve for x
    x = 200,846,930.67/18,931.28
  6. Step 6: Final answer
    x = 10,609.27

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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.