Home / 21,285.43-31,918.75-7,953.23

Finding the Fourth Proportional to 21,285.43, 31,918.75 and 7,953.23

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Solution

The fourth proportional to 21,285.43, 31,918.75 and 7,953.23 is: 11,926.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.43 : 31,918.75 = 7,953.23 : x
  2. Step 2: Convert to fraction form
    21,285.43/31,918.75 = 7,953.23/x
  3. Step 3: Cross multiply
    21,285.43x = 31,918.75 × 7,953.23
  4. Step 4: Simplify right side
    21,285.43x = 253,857,160.06
  5. Step 5: Solve for x
    x = 253,857,160.06/21,285.43
  6. Step 6: Final answer
    x = 11,926.33

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1.5x scale

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.