Home / 20,385.63-30,587.81-12,082.11

Finding the Fourth Proportional to 20,385.63, 30,587.81 and 12,082.11

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Solution

The fourth proportional to 20,385.63, 30,587.81 and 12,082.11 is: 18,128.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.63 : 30,587.81 = 12,082.11 : x
  2. Step 2: Convert to fraction form
    20,385.63/30,587.81 = 12,082.11/x
  3. Step 3: Cross multiply
    20,385.63x = 30,587.81 × 12,082.11
  4. Step 4: Simplify right side
    20,385.63x = 369,565,224.67
  5. Step 5: Solve for x
    x = 369,565,224.67/20,385.63
  6. Step 6: Final answer
    x = 18,128.71

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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.