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Finding the Fourth Proportional to 7,830.87, 10,742.24 and 7,407.18

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Solution

The fourth proportional to 7,830.87, 10,742.24 and 7,407.18 is: 10,161.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,830.87 : 10,742.24 = 7,407.18 : x
  2. Step 2: Convert to fraction form
    7,830.87/10,742.24 = 7,407.18/x
  3. Step 3: Cross multiply
    7,830.87x = 10,742.24 × 7,407.18
  4. Step 4: Simplify right side
    7,830.87x = 79,569,668.25
  5. Step 5: Solve for x
    x = 79,569,668.25/7,830.87
  6. Step 6: Final answer
    x = 10,161.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.