Home / 21,179.08-31,772.76-6,389.20

Finding the Fourth Proportional to 21,179.08, 31,772.76 and 6,389.20

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Solution

The fourth proportional to 21,179.08, 31,772.76 and 6,389.20 is: 9,585.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.08 : 31,772.76 = 6,389.20 : x
  2. Step 2: Convert to fraction form
    21,179.08/31,772.76 = 6,389.20/x
  3. Step 3: Cross multiply
    21,179.08x = 31,772.76 × 6,389.20
  4. Step 4: Simplify right side
    21,179.08x = 203,002,518.19
  5. Step 5: Solve for x
    x = 203,002,518.19/21,179.08
  6. Step 6: Final answer
    x = 9,585.05

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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.