Home / 42,138.88-63,217.44-12,559.12

Finding the Fourth Proportional to 42,138.88, 63,217.44 and 12,559.12

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Solution

The fourth proportional to 42,138.88, 63,217.44 and 12,559.12 is: 18,841.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,138.88 : 63,217.44 = 12,559.12 : x
  2. Step 2: Convert to fraction form
    42,138.88/63,217.44 = 12,559.12/x
  3. Step 3: Cross multiply
    42,138.88x = 63,217.44 × 12,559.12
  4. Step 4: Simplify right side
    42,138.88x = 793,955,415.05
  5. Step 5: Solve for x
    x = 793,955,415.05/42,138.88
  6. Step 6: Final answer
    x = 18,841.40

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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.