Home / 39,031.20-53,829-31,475.34

Finding the Fourth Proportional to 39,031.20, 53,829 and 31,475.34

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Solution

The fourth proportional to 39,031.20, 53,829 and 31,475.34 is: 43,408.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,031.20 : 53,829 = 31,475.34 : x
  2. Step 2: Convert to fraction form
    39,031.20/53,829 = 31,475.34/x
  3. Step 3: Cross multiply
    39,031.20x = 53,829 × 31,475.34
  4. Step 4: Simplify right side
    39,031.20x = 1,694,286,076.86
  5. Step 5: Solve for x
    x = 1,694,286,076.86/39,031.20
  6. Step 6: Final answer
    x = 43,408.51

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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.