Home / 21,443.87-29,606.99-13,389.80

Finding the Fourth Proportional to 21,443.87, 29,606.99 and 13,389.80

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Solution

The fourth proportional to 21,443.87, 29,606.99 and 13,389.80 is: 18,486.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,443.87 : 29,606.99 = 13,389.80 : x
  2. Step 2: Convert to fraction form
    21,443.87/29,606.99 = 13,389.80/x
  3. Step 3: Cross multiply
    21,443.87x = 29,606.99 × 13,389.80
  4. Step 4: Simplify right side
    21,443.87x = 396,431,459.72
  5. Step 5: Solve for x
    x = 396,431,459.72/21,443.87
  6. Step 6: Final answer
    x = 18,486.94

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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.