Home / 21,270.08-31,909-6,477.32

Finding the Fourth Proportional to 21,270.08, 31,909 and 6,477.32

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Solution

The fourth proportional to 21,270.08, 31,909 and 6,477.32 is: 9,717.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.08 : 31,909 = 6,477.32 : x
  2. Step 2: Convert to fraction form
    21,270.08/31,909 = 6,477.32/x
  3. Step 3: Cross multiply
    21,270.08x = 31,909 × 6,477.32
  4. Step 4: Simplify right side
    21,270.08x = 206,684,803.88
  5. Step 5: Solve for x
    x = 206,684,803.88/21,270.08
  6. Step 6: Final answer
    x = 9,717.16

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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.