Home / 15,693.13-21,651.30-9,321.67

Finding the Fourth Proportional to 15,693.13, 21,651.30 and 9,321.67

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Solution

The fourth proportional to 15,693.13, 21,651.30 and 9,321.67 is: 12,860.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.13 : 21,651.30 = 9,321.67 : x
  2. Step 2: Convert to fraction form
    15,693.13/21,651.30 = 9,321.67/x
  3. Step 3: Cross multiply
    15,693.13x = 21,651.30 × 9,321.67
  4. Step 4: Simplify right side
    15,693.13x = 201,826,273.67
  5. Step 5: Solve for x
    x = 201,826,273.67/15,693.13
  6. Step 6: Final answer
    x = 12,860.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.