Home / 20,901.60-31,328.81-10,379.13

Finding the Fourth Proportional to 20,901.60, 31,328.81 and 10,379.13

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Solution

The fourth proportional to 20,901.60, 31,328.81 and 10,379.13 is: 15,556.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.60 : 31,328.81 = 10,379.13 : x
  2. Step 2: Convert to fraction form
    20,901.60/31,328.81 = 10,379.13/x
  3. Step 3: Cross multiply
    20,901.60x = 31,328.81 × 10,379.13
  4. Step 4: Simplify right side
    20,901.60x = 325,165,817.68
  5. Step 5: Solve for x
    x = 325,165,817.68/20,901.60
  6. Step 6: Final answer
    x = 15,556.98

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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.