Home / 11,085.90-15,294.68-7,109.20

Finding the Fourth Proportional to 11,085.90, 15,294.68 and 7,109.20

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Solution

The fourth proportional to 11,085.90, 15,294.68 and 7,109.20 is: 9,808.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,085.90 : 15,294.68 = 7,109.20 : x
  2. Step 2: Convert to fraction form
    11,085.90/15,294.68 = 7,109.20/x
  3. Step 3: Cross multiply
    11,085.90x = 15,294.68 × 7,109.20
  4. Step 4: Simplify right side
    11,085.90x = 108,732,903.51
  5. Step 5: Solve for x
    x = 108,732,903.51/11,085.90
  6. Step 6: Final answer
    x = 9,808.22

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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.