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Finding the Fourth Proportional to 7,072.81, 10,609.21 and 1,878.68

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Solution

The fourth proportional to 7,072.81, 10,609.21 and 1,878.68 is: 2,818.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,072.81 : 10,609.21 = 1,878.68 : x
  2. Step 2: Convert to fraction form
    7,072.81/10,609.21 = 1,878.68/x
  3. Step 3: Cross multiply
    7,072.81x = 10,609.21 × 1,878.68
  4. Step 4: Simplify right side
    7,072.81x = 19,931,332.47
  5. Step 5: Solve for x
    x = 19,931,332.47/7,072.81
  6. Step 6: Final answer
    x = 2,818.02

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Similar ratio
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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.