Home / 42,815.22-64,190.70-13,215.66

Finding the Fourth Proportional to 42,815.22, 64,190.70 and 13,215.66

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Solution

The fourth proportional to 42,815.22, 64,190.70 and 13,215.66 is: 19,813.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,815.22 : 64,190.70 = 13,215.66 : x
  2. Step 2: Convert to fraction form
    42,815.22/64,190.70 = 13,215.66/x
  3. Step 3: Cross multiply
    42,815.22x = 64,190.70 × 13,215.66
  4. Step 4: Simplify right side
    42,815.22x = 848,322,466.36
  5. Step 5: Solve for x
    x = 848,322,466.36/42,815.22
  6. Step 6: Final answer
    x = 19,813.57

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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.