Home / 34,785.18-47,981.70-20,628

Finding the Fourth Proportional to 34,785.18, 47,981.70 and 20,628

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Solution

The fourth proportional to 34,785.18, 47,981.70 and 20,628 is: 28,453.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,785.18 : 47,981.70 = 20,628 : x
  2. Step 2: Convert to fraction form
    34,785.18/47,981.70 = 20,628/x
  3. Step 3: Cross multiply
    34,785.18x = 47,981.70 × 20,628
  4. Step 4: Simplify right side
    34,785.18x = 989,766,507.60
  5. Step 5: Solve for x
    x = 989,766,507.60/34,785.18
  6. Step 6: Final answer
    x = 28,453.68

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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.