Home / 11,113.29-15,329.12-7,128.09

Finding the Fourth Proportional to 11,113.29, 15,329.12 and 7,128.09

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Solution

The fourth proportional to 11,113.29, 15,329.12 and 7,128.09 is: 9,832.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,113.29 : 15,329.12 = 7,128.09 : x
  2. Step 2: Convert to fraction form
    11,113.29/15,329.12 = 7,128.09/x
  3. Step 3: Cross multiply
    11,113.29x = 15,329.12 × 7,128.09
  4. Step 4: Simplify right side
    11,113.29x = 109,267,311.34
  5. Step 5: Solve for x
    x = 109,267,311.34/11,113.29
  6. Step 6: Final answer
    x = 9,832.13

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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.