Home / 31,421.50-47,120.28-13,881.76

Finding the Fourth Proportional to 31,421.50, 47,120.28 and 13,881.76

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Solution

The fourth proportional to 31,421.50, 47,120.28 and 13,881.76 is: 20,817.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,421.50 : 47,120.28 = 13,881.76 : x
  2. Step 2: Convert to fraction form
    31,421.50/47,120.28 = 13,881.76/x
  3. Step 3: Cross multiply
    31,421.50x = 47,120.28 × 13,881.76
  4. Step 4: Simplify right side
    31,421.50x = 654,112,418.09
  5. Step 5: Solve for x
    x = 654,112,418.09/31,421.50
  6. Step 6: Final answer
    x = 20,817.35

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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.