Home / 28,880.74-39,836.01-21,729.25

Finding the Fourth Proportional to 28,880.74, 39,836.01 and 21,729.25

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Solution

The fourth proportional to 28,880.74, 39,836.01 and 21,729.25 is: 29,971.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,880.74 : 39,836.01 = 21,729.25 : x
  2. Step 2: Convert to fraction form
    28,880.74/39,836.01 = 21,729.25/x
  3. Step 3: Cross multiply
    28,880.74x = 39,836.01 × 21,729.25
  4. Step 4: Simplify right side
    28,880.74x = 865,606,620.29
  5. Step 5: Solve for x
    x = 865,606,620.29/28,880.74
  6. Step 6: Final answer
    x = 29,971.76

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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.