Home / 13,981.59-20,972.28-5,661.48

Finding the Fourth Proportional to 13,981.59, 20,972.28 and 5,661.48

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Solution

The fourth proportional to 13,981.59, 20,972.28 and 5,661.48 is: 8,492.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.59 : 20,972.28 = 5,661.48 : x
  2. Step 2: Convert to fraction form
    13,981.59/20,972.28 = 5,661.48/x
  3. Step 3: Cross multiply
    13,981.59x = 20,972.28 × 5,661.48
  4. Step 4: Simplify right side
    13,981.59x = 118,734,038.91
  5. Step 5: Solve for x
    x = 118,734,038.91/13,981.59
  6. Step 6: Final answer
    x = 8,492.17

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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.