Home / 30,111.87-45,170.88-10,390.37

Finding the Fourth Proportional to 30,111.87, 45,170.88 and 10,390.37

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Solution

The fourth proportional to 30,111.87, 45,170.88 and 10,390.37 is: 15,586.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,111.87 : 45,170.88 = 10,390.37 : x
  2. Step 2: Convert to fraction form
    30,111.87/45,170.88 = 10,390.37/x
  3. Step 3: Cross multiply
    30,111.87x = 45,170.88 × 10,390.37
  4. Step 4: Simplify right side
    30,111.87x = 469,341,930.57
  5. Step 5: Solve for x
    x = 469,341,930.57/30,111.87
  6. Step 6: Final answer
    x = 15,586.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.