Home / 21,749.14-29,985.25-15,694.30

Finding the Fourth Proportional to 21,749.14, 29,985.25 and 15,694.30

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Solution

The fourth proportional to 21,749.14, 29,985.25 and 15,694.30 is: 21,637.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,749.14 : 29,985.25 = 15,694.30 : x
  2. Step 2: Convert to fraction form
    21,749.14/29,985.25 = 15,694.30/x
  3. Step 3: Cross multiply
    21,749.14x = 29,985.25 × 15,694.30
  4. Step 4: Simplify right side
    21,749.14x = 470,597,280.68
  5. Step 5: Solve for x
    x = 470,597,280.68/21,749.14
  6. Step 6: Final answer
    x = 21,637.52

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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.