Home / 21,640.86-32,461.11-12,285.18

Finding the Fourth Proportional to 21,640.86, 32,461.11 and 12,285.18

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Solution

The fourth proportional to 21,640.86, 32,461.11 and 12,285.18 is: 18,427.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,640.86 : 32,461.11 = 12,285.18 : x
  2. Step 2: Convert to fraction form
    21,640.86/32,461.11 = 12,285.18/x
  3. Step 3: Cross multiply
    21,640.86x = 32,461.11 × 12,285.18
  4. Step 4: Simplify right side
    21,640.86x = 398,790,579.35
  5. Step 5: Solve for x
    x = 398,790,579.35/21,640.86
  6. Step 6: Final answer
    x = 18,427.67

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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.