Home / 11,143.58-15,369.66-7,111.64

Finding the Fourth Proportional to 11,143.58, 15,369.66 and 7,111.64

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Solution

The fourth proportional to 11,143.58, 15,369.66 and 7,111.64 is: 9,808.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,143.58 : 15,369.66 = 7,111.64 : x
  2. Step 2: Convert to fraction form
    11,143.58/15,369.66 = 7,111.64/x
  3. Step 3: Cross multiply
    11,143.58x = 15,369.66 × 7,111.64
  4. Step 4: Simplify right side
    11,143.58x = 109,303,411.99
  5. Step 5: Solve for x
    x = 109,303,411.99/11,143.58
  6. Step 6: Final answer
    x = 9,808.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.