Home / 31,421.37-47,105.51-13,638.58

Finding the Fourth Proportional to 31,421.37, 47,105.51 and 13,638.58

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Solution

The fourth proportional to 31,421.37, 47,105.51 and 13,638.58 is: 20,446.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,421.37 : 47,105.51 = 13,638.58 : x
  2. Step 2: Convert to fraction form
    31,421.37/47,105.51 = 13,638.58/x
  3. Step 3: Cross multiply
    31,421.37x = 47,105.51 × 13,638.58
  4. Step 4: Simplify right side
    31,421.37x = 642,452,257.26
  5. Step 5: Solve for x
    x = 642,452,257.26/31,421.37
  6. Step 6: Final answer
    x = 20,446.35

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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.