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Finding the Fourth Proportional to 7,111.68, 10,669.80 and 2,953.68

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Solution

The fourth proportional to 7,111.68, 10,669.80 and 2,953.68 is: 4,431.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.68 : 10,669.80 = 2,953.68 : x
  2. Step 2: Convert to fraction form
    7,111.68/10,669.80 = 2,953.68/x
  3. Step 3: Cross multiply
    7,111.68x = 10,669.80 × 2,953.68
  4. Step 4: Simplify right side
    7,111.68x = 31,515,174.86
  5. Step 5: Solve for x
    x = 31,515,174.86/7,111.68
  6. Step 6: Final answer
    x = 4,431.47

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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.