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Finding the Fourth Proportional to 42,039.52, 63,059.05 and 12,455.08

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Solution

The fourth proportional to 42,039.52, 63,059.05 and 12,455.08 is: 18,682.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,039.52 : 63,059.05 = 12,455.08 : x
  2. Step 2: Convert to fraction form
    42,039.52/63,059.05 = 12,455.08/x
  3. Step 3: Cross multiply
    42,039.52x = 63,059.05 × 12,455.08
  4. Step 4: Simplify right side
    42,039.52x = 785,405,512.47
  5. Step 5: Solve for x
    x = 785,405,512.47/42,039.52
  6. Step 6: Final answer
    x = 18,682.55

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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.