Home / 21,750.14-29,986.62-15,695.30

Finding the Fourth Proportional to 21,750.14, 29,986.62 and 15,695.30

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Solution

The fourth proportional to 21,750.14, 29,986.62 and 15,695.30 is: 21,638.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.14 : 29,986.62 = 15,695.30 : x
  2. Step 2: Convert to fraction form
    21,750.14/29,986.62 = 15,695.30/x
  3. Step 3: Cross multiply
    21,750.14x = 29,986.62 × 15,695.30
  4. Step 4: Simplify right side
    21,750.14x = 470,648,996.89
  5. Step 5: Solve for x
    x = 470,648,996.89/21,750.14
  6. Step 6: Final answer
    x = 21,638.90

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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.