Home / 21,046.37-31,561.32-7,891.57

Finding the Fourth Proportional to 21,046.37, 31,561.32 and 7,891.57

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Solution

The fourth proportional to 21,046.37, 31,561.32 and 7,891.57 is: 11,834.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,046.37 : 31,561.32 = 7,891.57 : x
  2. Step 2: Convert to fraction form
    21,046.37/31,561.32 = 7,891.57/x
  3. Step 3: Cross multiply
    21,046.37x = 31,561.32 × 7,891.57
  4. Step 4: Simplify right side
    21,046.37x = 249,068,366.07
  5. Step 5: Solve for x
    x = 249,068,366.07/21,046.37
  6. Step 6: Final answer
    x = 11,834.27

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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.