Home / 20,880.12-31,320.12-5,297.70

Finding the Fourth Proportional to 20,880.12, 31,320.12 and 5,297.70

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Solution

The fourth proportional to 20,880.12, 31,320.12 and 5,297.70 is: 7,946.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.12 : 31,320.12 = 5,297.70 : x
  2. Step 2: Convert to fraction form
    20,880.12/31,320.12 = 5,297.70/x
  3. Step 3: Cross multiply
    20,880.12x = 31,320.12 × 5,297.70
  4. Step 4: Simplify right side
    20,880.12x = 165,924,599.72
  5. Step 5: Solve for x
    x = 165,924,599.72/20,880.12
  6. Step 6: Final answer
    x = 7,946.53

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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.