Home / 21,203.08-31,803.81-8,719.63

Finding the Fourth Proportional to 21,203.08, 31,803.81 and 8,719.63

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Solution

The fourth proportional to 21,203.08, 31,803.81 and 8,719.63 is: 13,079.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.08 : 31,803.81 = 8,719.63 : x
  2. Step 2: Convert to fraction form
    21,203.08/31,803.81 = 8,719.63/x
  3. Step 3: Cross multiply
    21,203.08x = 31,803.81 × 8,719.63
  4. Step 4: Simplify right side
    21,203.08x = 277,317,455.79
  5. Step 5: Solve for x
    x = 277,317,455.79/21,203.08
  6. Step 6: Final answer
    x = 13,079.11

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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.