Home / 21,540.90-29,730.33-13,585.89

Finding the Fourth Proportional to 21,540.90, 29,730.33 and 13,585.89

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Solution

The fourth proportional to 21,540.90, 29,730.33 and 13,585.89 is: 18,750.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.90 : 29,730.33 = 13,585.89 : x
  2. Step 2: Convert to fraction form
    21,540.90/29,730.33 = 13,585.89/x
  3. Step 3: Cross multiply
    21,540.90x = 29,730.33 × 13,585.89
  4. Step 4: Simplify right side
    21,540.90x = 403,912,993.04
  5. Step 5: Solve for x
    x = 403,912,993.04/21,540.90
  6. Step 6: Final answer
    x = 18,750.98

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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.