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Finding the Fourth Proportional to 42,354.63, 63,507.65 and 12,763.71

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Solution

The fourth proportional to 42,354.63, 63,507.65 and 12,763.71 is: 19,138.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,354.63 : 63,507.65 = 12,763.71 : x
  2. Step 2: Convert to fraction form
    42,354.63/63,507.65 = 12,763.71/x
  3. Step 3: Cross multiply
    42,354.63x = 63,507.65 × 12,763.71
  4. Step 4: Simplify right side
    42,354.63x = 810,593,163.56
  5. Step 5: Solve for x
    x = 810,593,163.56/42,354.63
  6. Step 6: Final answer
    x = 19,138.24

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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.