Home / 42,135.54-63,212.43-12,555.77

Finding the Fourth Proportional to 42,135.54, 63,212.43 and 12,555.77

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Solution

The fourth proportional to 42,135.54, 63,212.43 and 12,555.77 is: 18,836.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,135.54 : 63,212.43 = 12,555.77 : x
  2. Step 2: Convert to fraction form
    42,135.54/63,212.43 = 12,555.77/x
  3. Step 3: Cross multiply
    42,135.54x = 63,212.43 × 12,555.77
  4. Step 4: Simplify right side
    42,135.54x = 793,680,416.16
  5. Step 5: Solve for x
    x = 793,680,416.16/42,135.54
  6. Step 6: Final answer
    x = 18,836.37

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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.