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Finding the Fourth Proportional to 40,709.40, 61,064.40 and 12,628.92

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Solution

The fourth proportional to 40,709.40, 61,064.40 and 12,628.92 is: 18,943.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,709.40 : 61,064.40 = 12,628.92 : x
  2. Step 2: Convert to fraction form
    40,709.40/61,064.40 = 12,628.92/x
  3. Step 3: Cross multiply
    40,709.40x = 61,064.40 × 12,628.92
  4. Step 4: Simplify right side
    40,709.40x = 771,177,359.30
  5. Step 5: Solve for x
    x = 771,177,359.30/40,709.40
  6. Step 6: Final answer
    x = 18,943.47

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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.