Home / 20,285.24-30,427.86-8,438.79

Finding the Fourth Proportional to 20,285.24, 30,427.86 and 8,438.79

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Solution

The fourth proportional to 20,285.24, 30,427.86 and 8,438.79 is: 12,658.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,285.24 : 30,427.86 = 8,438.79 : x
  2. Step 2: Convert to fraction form
    20,285.24/30,427.86 = 8,438.79/x
  3. Step 3: Cross multiply
    20,285.24x = 30,427.86 × 8,438.79
  4. Step 4: Simplify right side
    20,285.24x = 256,774,247.81
  5. Step 5: Solve for x
    x = 256,774,247.81/20,285.24
  6. Step 6: Final answer
    x = 12,658.18

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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.