Home / 15,235.15-21,023.87-8,861.75

Finding the Fourth Proportional to 15,235.15, 21,023.87 and 8,861.75

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Solution

The fourth proportional to 15,235.15, 21,023.87 and 8,861.75 is: 12,228.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,235.15 : 21,023.87 = 8,861.75 : x
  2. Step 2: Convert to fraction form
    15,235.15/21,023.87 = 8,861.75/x
  3. Step 3: Cross multiply
    15,235.15x = 21,023.87 × 8,861.75
  4. Step 4: Simplify right side
    15,235.15x = 186,308,340.11
  5. Step 5: Solve for x
    x = 186,308,340.11/15,235.15
  6. Step 6: Final answer
    x = 12,228.85

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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.