Home / 21,662.98-29,899.65-13,715.80

Finding the Fourth Proportional to 21,662.98, 29,899.65 and 13,715.80

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Solution

The fourth proportional to 21,662.98, 29,899.65 and 13,715.80 is: 18,930.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,662.98 : 29,899.65 = 13,715.80 : x
  2. Step 2: Convert to fraction form
    21,662.98/29,899.65 = 13,715.80/x
  3. Step 3: Cross multiply
    21,662.98x = 29,899.65 × 13,715.80
  4. Step 4: Simplify right side
    21,662.98x = 410,097,619.47
  5. Step 5: Solve for x
    x = 410,097,619.47/21,662.98
  6. Step 6: Final answer
    x = 18,930.80

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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.