Home / 11,109.76-15,315.68-6,858.07

Finding the Fourth Proportional to 11,109.76, 15,315.68 and 6,858.07

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Solution

The fourth proportional to 11,109.76, 15,315.68 and 6,858.07 is: 9,454.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,109.76 : 15,315.68 = 6,858.07 : x
  2. Step 2: Convert to fraction form
    11,109.76/15,315.68 = 6,858.07/x
  3. Step 3: Cross multiply
    11,109.76x = 15,315.68 × 6,858.07
  4. Step 4: Simplify right side
    11,109.76x = 105,035,984.39
  5. Step 5: Solve for x
    x = 105,035,984.39/11,109.76
  6. Step 6: Final answer
    x = 9,454.39

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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.