Home / 21,856,780.87-30,165,002.78-12,439,861.54

Finding the Fourth Proportional to 21,856,780.87, 30,165,002.78 and 12,439,861.54

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Solution

The fourth proportional to 21,856,780.87, 30,165,002.78 and 12,439,861.54 is: 17,168,514.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,856,780.87 : 30,165,002.78 = 12,439,861.54 : x
  2. Step 2: Convert to fraction form
    21,856,780.87/30,165,002.78 = 12,439,861.54/x
  3. Step 3: Cross multiply
    21,856,780.87x = 30,165,002.78 × 12,439,861.54
  4. Step 4: Simplify right side
    21,856,780.87x = 375,248,457,799,303.25
  5. Step 5: Solve for x
    x = 375,248,457,799,303.25/21,856,780.87
  6. Step 6: Final answer
    x = 17,168,514.43

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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.