Home / 21,812.72-30,071.32-14,727.92

Finding the Fourth Proportional to 21,812.72, 30,071.32 and 14,727.92

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Solution

The fourth proportional to 21,812.72, 30,071.32 and 14,727.92 is: 20,304.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,812.72 : 30,071.32 = 14,727.92 : x
  2. Step 2: Convert to fraction form
    21,812.72/30,071.32 = 14,727.92/x
  3. Step 3: Cross multiply
    21,812.72x = 30,071.32 × 14,727.92
  4. Step 4: Simplify right side
    21,812.72x = 442,887,995.25
  5. Step 5: Solve for x
    x = 442,887,995.25/21,812.72
  6. Step 6: Final answer
    x = 20,304.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.