Home / 15,405.71-21,263.37-12,883.44

Finding the Fourth Proportional to 15,405.71, 21,263.37 and 12,883.44

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Solution

The fourth proportional to 15,405.71, 21,263.37 and 12,883.44 is: 17,782.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.71 : 21,263.37 = 12,883.44 : x
  2. Step 2: Convert to fraction form
    15,405.71/21,263.37 = 12,883.44/x
  3. Step 3: Cross multiply
    15,405.71x = 21,263.37 × 12,883.44
  4. Step 4: Simplify right side
    15,405.71x = 273,945,351.59
  5. Step 5: Solve for x
    x = 273,945,351.59/15,405.71
  6. Step 6: Final answer
    x = 17,782.07

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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.