Home / 20,367.18-30,509.19-10,485.70

Finding the Fourth Proportional to 20,367.18, 30,509.19 and 10,485.70

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Solution

The fourth proportional to 20,367.18, 30,509.19 and 10,485.70 is: 15,707.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,367.18 : 30,509.19 = 10,485.70 : x
  2. Step 2: Convert to fraction form
    20,367.18/30,509.19 = 10,485.70/x
  3. Step 3: Cross multiply
    20,367.18x = 30,509.19 × 10,485.70
  4. Step 4: Simplify right side
    20,367.18x = 319,910,137.31
  5. Step 5: Solve for x
    x = 319,910,137.31/20,367.18
  6. Step 6: Final answer
    x = 15,707.14

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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.