Home / 15,867.90-21,890.34-11,154.96

Finding the Fourth Proportional to 15,867.90, 21,890.34 and 11,154.96

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Solution

The fourth proportional to 15,867.90, 21,890.34 and 11,154.96 is: 15,388.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,867.90 : 21,890.34 = 11,154.96 : x
  2. Step 2: Convert to fraction form
    15,867.90/21,890.34 = 11,154.96/x
  3. Step 3: Cross multiply
    15,867.90x = 21,890.34 × 11,154.96
  4. Step 4: Simplify right side
    15,867.90x = 244,185,867.09
  5. Step 5: Solve for x
    x = 244,185,867.09/15,867.90
  6. Step 6: Final answer
    x = 15,388.67

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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.