Home / 28,735.90-39,680.46-21,195.30

Finding the Fourth Proportional to 28,735.90, 39,680.46 and 21,195.30

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Solution

The fourth proportional to 28,735.90, 39,680.46 and 21,195.30 is: 29,267.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,735.90 : 39,680.46 = 21,195.30 : x
  2. Step 2: Convert to fraction form
    28,735.90/39,680.46 = 21,195.30/x
  3. Step 3: Cross multiply
    28,735.90x = 39,680.46 × 21,195.30
  4. Step 4: Simplify right side
    28,735.90x = 841,039,253.84
  5. Step 5: Solve for x
    x = 841,039,253.84/28,735.90
  6. Step 6: Final answer
    x = 29,267.89

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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.