Home / 21,628.71-29,830.34-14,912.80

Finding the Fourth Proportional to 21,628.71, 29,830.34 and 14,912.80

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Solution

The fourth proportional to 21,628.71, 29,830.34 and 14,912.80 is: 20,567.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,628.71 : 29,830.34 = 14,912.80 : x
  2. Step 2: Convert to fraction form
    21,628.71/29,830.34 = 14,912.80/x
  3. Step 3: Cross multiply
    21,628.71x = 29,830.34 × 14,912.80
  4. Step 4: Simplify right side
    21,628.71x = 444,853,857.06
  5. Step 5: Solve for x
    x = 444,853,857.06/21,628.71
  6. Step 6: Final answer
    x = 20,567.75

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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.