Home / 31,045.21-42,850.63-19,118.54

Finding the Fourth Proportional to 31,045.21, 42,850.63 and 19,118.54

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Solution

The fourth proportional to 31,045.21, 42,850.63 and 19,118.54 is: 26,388.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,045.21 : 42,850.63 = 19,118.54 : x
  2. Step 2: Convert to fraction form
    31,045.21/42,850.63 = 19,118.54/x
  3. Step 3: Cross multiply
    31,045.21x = 42,850.63 × 19,118.54
  4. Step 4: Simplify right side
    31,045.21x = 819,241,483.68
  5. Step 5: Solve for x
    x = 819,241,483.68/31,045.21
  6. Step 6: Final answer
    x = 26,388.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.