Home / 20,901.83-31,355.80-9,809.64

Finding the Fourth Proportional to 20,901.83, 31,355.80 and 9,809.64

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Solution

The fourth proportional to 20,901.83, 31,355.80 and 9,809.64 is: 14,715.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.83 : 31,355.80 = 9,809.64 : x
  2. Step 2: Convert to fraction form
    20,901.83/31,355.80 = 9,809.64/x
  3. Step 3: Cross multiply
    20,901.83x = 31,355.80 × 9,809.64
  4. Step 4: Simplify right side
    20,901.83x = 307,589,085.39
  5. Step 5: Solve for x
    x = 307,589,085.39/20,901.83
  6. Step 6: Final answer
    x = 14,715.90

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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.