Home / 11,115.65-15,347.63-6,872.53

Finding the Fourth Proportional to 11,115.65, 15,347.63 and 6,872.53

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Solution

The fourth proportional to 11,115.65, 15,347.63 and 6,872.53 is: 9,489.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.65 : 15,347.63 = 6,872.53 : x
  2. Step 2: Convert to fraction form
    11,115.65/15,347.63 = 6,872.53/x
  3. Step 3: Cross multiply
    11,115.65x = 15,347.63 × 6,872.53
  4. Step 4: Simplify right side
    11,115.65x = 105,477,047.60
  5. Step 5: Solve for x
    x = 105,477,047.60/11,115.65
  6. Step 6: Final answer
    x = 9,489.06

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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.