Home / 7,121.28-10,681.52-1,926.76

Finding the Fourth Proportional to 7,121.28, 10,681.52 and 1,926.76

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Solution

The fourth proportional to 7,121.28, 10,681.52 and 1,926.76 is: 2,890.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.28 : 10,681.52 = 1,926.76 : x
  2. Step 2: Convert to fraction form
    7,121.28/10,681.52 = 1,926.76/x
  3. Step 3: Cross multiply
    7,121.28x = 10,681.52 × 1,926.76
  4. Step 4: Simplify right side
    7,121.28x = 20,580,725.48
  5. Step 5: Solve for x
    x = 20,580,725.48/7,121.28
  6. Step 6: Final answer
    x = 2,890.03

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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.