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Finding the Fourth Proportional to 7,051.74, 10,515.39 and 6,988.47

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Solution

The fourth proportional to 7,051.74, 10,515.39 and 6,988.47 is: 10,421.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,051.74 : 10,515.39 = 6,988.47 : x
  2. Step 2: Convert to fraction form
    7,051.74/10,515.39 = 6,988.47/x
  3. Step 3: Cross multiply
    7,051.74x = 10,515.39 × 6,988.47
  4. Step 4: Simplify right side
    7,051.74x = 73,486,487.55
  5. Step 5: Solve for x
    x = 73,486,487.55/7,051.74
  6. Step 6: Final answer
    x = 10,421.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.