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Finding the Fourth Proportional to 7,113.48, 10,668.93 and 1,918.14

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Solution

The fourth proportional to 7,113.48, 10,668.93 and 1,918.14 is: 2,876.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,113.48 : 10,668.93 = 1,918.14 : x
  2. Step 2: Convert to fraction form
    7,113.48/10,668.93 = 1,918.14/x
  3. Step 3: Cross multiply
    7,113.48x = 10,668.93 × 1,918.14
  4. Step 4: Simplify right side
    7,113.48x = 20,464,501.39
  5. Step 5: Solve for x
    x = 20,464,501.39/7,113.48
  6. Step 6: Final answer
    x = 2,876.86

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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.