Home / 34,143.78-51,215.16-20,820.69

Finding the Fourth Proportional to 34,143.78, 51,215.16 and 20,820.69

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Solution

The fourth proportional to 34,143.78, 51,215.16 and 20,820.69 is: 31,230.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,143.78 : 51,215.16 = 20,820.69 : x
  2. Step 2: Convert to fraction form
    34,143.78/51,215.16 = 20,820.69/x
  3. Step 3: Cross multiply
    34,143.78x = 51,215.16 × 20,820.69
  4. Step 4: Simplify right side
    34,143.78x = 1,066,334,969.66
  5. Step 5: Solve for x
    x = 1,066,334,969.66/34,143.78
  6. Step 6: Final answer
    x = 31,230.72

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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.