Home / 21,114.30-31,659.74-8,643.08

Finding the Fourth Proportional to 21,114.30, 31,659.74 and 8,643.08

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Solution

The fourth proportional to 21,114.30, 31,659.74 and 8,643.08 is: 12,959.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.30 : 31,659.74 = 8,643.08 : x
  2. Step 2: Convert to fraction form
    21,114.30/31,659.74 = 8,643.08/x
  3. Step 3: Cross multiply
    21,114.30x = 31,659.74 × 8,643.08
  4. Step 4: Simplify right side
    21,114.30x = 273,637,665.60
  5. Step 5: Solve for x
    x = 273,637,665.60/21,114.30
  6. Step 6: Final answer
    x = 12,959.83

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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.