Home / 21,780.10-30,065.73-14,716.09

Finding the Fourth Proportional to 21,780.10, 30,065.73 and 14,716.09

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Solution

The fourth proportional to 21,780.10, 30,065.73 and 14,716.09 is: 20,314.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.10 : 30,065.73 = 14,716.09 : x
  2. Step 2: Convert to fraction form
    21,780.10/30,065.73 = 14,716.09/x
  3. Step 3: Cross multiply
    21,780.10x = 30,065.73 × 14,716.09
  4. Step 4: Simplify right side
    21,780.10x = 442,449,988.60
  5. Step 5: Solve for x
    x = 442,449,988.60/21,780.10
  6. Step 6: Final answer
    x = 20,314.41

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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.