Home / 15,101.40-20,838.92-8,386.72

Finding the Fourth Proportional to 15,101.40, 20,838.92 and 8,386.72

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Solution

The fourth proportional to 15,101.40, 20,838.92 and 8,386.72 is: 11,573.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,101.40 : 20,838.92 = 8,386.72 : x
  2. Step 2: Convert to fraction form
    15,101.40/20,838.92 = 8,386.72/x
  3. Step 3: Cross multiply
    15,101.40x = 20,838.92 × 8,386.72
  4. Step 4: Simplify right side
    15,101.40x = 174,770,187.14
  5. Step 5: Solve for x
    x = 174,770,187.14/15,101.40
  6. Step 6: Final answer
    x = 11,573.11

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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.