Home / 28,730.89-39,673.56-21,190.30

Finding the Fourth Proportional to 28,730.89, 39,673.56 and 21,190.30

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Solution

The fourth proportional to 28,730.89, 39,673.56 and 21,190.30 is: 29,261.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,730.89 : 39,673.56 = 21,190.30 : x
  2. Step 2: Convert to fraction form
    28,730.89/39,673.56 = 21,190.30/x
  3. Step 3: Cross multiply
    28,730.89x = 39,673.56 × 21,190.30
  4. Step 4: Simplify right side
    28,730.89x = 840,694,638.47
  5. Step 5: Solve for x
    x = 840,694,638.47/28,730.89
  6. Step 6: Final answer
    x = 29,261.00

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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.