Home / 20,816.99-31,235.74-9,722.07

Finding the Fourth Proportional to 20,816.99, 31,235.74 and 9,722.07

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Solution

The fourth proportional to 20,816.99, 31,235.74 and 9,722.07 is: 14,587.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.99 : 31,235.74 = 9,722.07 : x
  2. Step 2: Convert to fraction form
    20,816.99/31,235.74 = 9,722.07/x
  3. Step 3: Cross multiply
    20,816.99x = 31,235.74 × 9,722.07
  4. Step 4: Simplify right side
    20,816.99x = 303,676,050.78
  5. Step 5: Solve for x
    x = 303,676,050.78/20,816.99
  6. Step 6: Final answer
    x = 14,587.89

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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.