Home / 31,913.85-47,870.76-8,539.68

Finding the Fourth Proportional to 31,913.85, 47,870.76 and 8,539.68

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Solution

The fourth proportional to 31,913.85, 47,870.76 and 8,539.68 is: 12,809.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,913.85 : 47,870.76 = 8,539.68 : x
  2. Step 2: Convert to fraction form
    31,913.85/47,870.76 = 8,539.68/x
  3. Step 3: Cross multiply
    31,913.85x = 47,870.76 × 8,539.68
  4. Step 4: Simplify right side
    31,913.85x = 408,800,971.76
  5. Step 5: Solve for x
    x = 408,800,971.76/31,913.85
  6. Step 6: Final answer
    x = 12,809.52

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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.