Home / 18,203,861.28-25,107,709.68-12,697,520.16

Finding the Fourth Proportional to 18,203,861.28, 25,107,709.68 and 12,697,520.16

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Solution

The fourth proportional to 18,203,861.28, 25,107,709.68 and 12,697,520.16 is: 17,513,078.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,203,861.28 : 25,107,709.68 = 12,697,520.16 : x
  2. Step 2: Convert to fraction form
    18,203,861.28/25,107,709.68 = 12,697,520.16/x
  3. Step 3: Cross multiply
    18,203,861.28x = 25,107,709.68 × 12,697,520.16
  4. Step 4: Simplify right side
    18,203,861.28x = 318,805,649,833,227.12
  5. Step 5: Solve for x
    x = 318,805,649,833,227.12/18,203,861.28
  6. Step 6: Final answer
    x = 17,513,078.40

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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.