Home / 31,853.28-43,946.16-21,900

Finding the Fourth Proportional to 31,853.28, 43,946.16 and 21,900

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Solution

The fourth proportional to 31,853.28, 43,946.16 and 21,900 is: 30,214.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,853.28 : 43,946.16 = 21,900 : x
  2. Step 2: Convert to fraction form
    31,853.28/43,946.16 = 21,900/x
  3. Step 3: Cross multiply
    31,853.28x = 43,946.16 × 21,900
  4. Step 4: Simplify right side
    31,853.28x = 962,420,904.00
  5. Step 5: Solve for x
    x = 962,420,904.00/31,853.28
  6. Step 6: Final answer
    x = 30,214.19

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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.