Home / 39,315.40-54,324.34-31,422.76

Finding the Fourth Proportional to 39,315.40, 54,324.34 and 31,422.76

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Solution

The fourth proportional to 39,315.40, 54,324.34 and 31,422.76 is: 43,418.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,315.40 : 54,324.34 = 31,422.76 : x
  2. Step 2: Convert to fraction form
    39,315.40/54,324.34 = 31,422.76/x
  3. Step 3: Cross multiply
    39,315.40x = 54,324.34 × 31,422.76
  4. Step 4: Simplify right side
    39,315.40x = 1,707,020,697.98
  5. Step 5: Solve for x
    x = 1,707,020,697.98/39,315.40
  6. Step 6: Final answer
    x = 43,418.63

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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.