Home / 28,973.75-39,983.78-15,725.75

Finding the Fourth Proportional to 28,973.75, 39,983.78 and 15,725.75

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Solution

The fourth proportional to 28,973.75, 39,983.78 and 15,725.75 is: 21,701.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,973.75 : 39,983.78 = 15,725.75 : x
  2. Step 2: Convert to fraction form
    28,973.75/39,983.78 = 15,725.75/x
  3. Step 3: Cross multiply
    28,973.75x = 39,983.78 × 15,725.75
  4. Step 4: Simplify right side
    28,973.75x = 628,774,928.34
  5. Step 5: Solve for x
    x = 628,774,928.34/28,973.75
  6. Step 6: Final answer
    x = 21,701.54

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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.