Home / 15,100.79-20,838.38-8,386.85

Finding the Fourth Proportional to 15,100.79, 20,838.38 and 8,386.85

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Solution

The fourth proportional to 15,100.79, 20,838.38 and 8,386.85 is: 11,573.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,100.79 : 20,838.38 = 8,386.85 : x
  2. Step 2: Convert to fraction form
    15,100.79/20,838.38 = 8,386.85/x
  3. Step 3: Cross multiply
    15,100.79x = 20,838.38 × 8,386.85
  4. Step 4: Simplify right side
    15,100.79x = 174,768,367.30
  5. Step 5: Solve for x
    x = 174,768,367.30/15,100.79
  6. Step 6: Final answer
    x = 11,573.46

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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.