Home / 21,201.72-31,802.88-6,410.76

Finding the Fourth Proportional to 21,201.72, 31,802.88 and 6,410.76

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Solution

The fourth proportional to 21,201.72, 31,802.88 and 6,410.76 is: 9,616.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,201.72 : 31,802.88 = 6,410.76 : x
  2. Step 2: Convert to fraction form
    21,201.72/31,802.88 = 6,410.76/x
  3. Step 3: Cross multiply
    21,201.72x = 31,802.88 × 6,410.76
  4. Step 4: Simplify right side
    21,201.72x = 203,880,630.99
  5. Step 5: Solve for x
    x = 203,880,630.99/21,201.72
  6. Step 6: Final answer
    x = 9,616.23

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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.