Home / 13,985.84-20,972.28-5,214.44

Finding the Fourth Proportional to 13,985.84, 20,972.28 and 5,214.44

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Solution

The fourth proportional to 13,985.84, 20,972.28 and 5,214.44 is: 7,819.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.84 : 20,972.28 = 5,214.44 : x
  2. Step 2: Convert to fraction form
    13,985.84/20,972.28 = 5,214.44/x
  3. Step 3: Cross multiply
    13,985.84x = 20,972.28 × 5,214.44
  4. Step 4: Simplify right side
    13,985.84x = 109,358,695.72
  5. Step 5: Solve for x
    x = 109,358,695.72/13,985.84
  6. Step 6: Final answer
    x = 7,819.24

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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.