Home / 13,981.86-20,973.87-5,657.94

Finding the Fourth Proportional to 13,981.86, 20,973.87 and 5,657.94

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Solution

The fourth proportional to 13,981.86, 20,973.87 and 5,657.94 is: 8,487.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.86 : 20,973.87 = 5,657.94 : x
  2. Step 2: Convert to fraction form
    13,981.86/20,973.87 = 5,657.94/x
  3. Step 3: Cross multiply
    13,981.86x = 20,973.87 × 5,657.94
  4. Step 4: Simplify right side
    13,981.86x = 118,668,898.03
  5. Step 5: Solve for x
    x = 118,668,898.03/13,981.86
  6. Step 6: Final answer
    x = 8,487.35

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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.