Home / 21,109.92-31,655.64-10,019.80

Finding the Fourth Proportional to 21,109.92, 31,655.64 and 10,019.80

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Solution

The fourth proportional to 21,109.92, 31,655.64 and 10,019.80 is: 15,025.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.92 : 31,655.64 = 10,019.80 : x
  2. Step 2: Convert to fraction form
    21,109.92/31,655.64 = 10,019.80/x
  3. Step 3: Cross multiply
    21,109.92x = 31,655.64 × 10,019.80
  4. Step 4: Simplify right side
    21,109.92x = 317,183,181.67
  5. Step 5: Solve for x
    x = 317,183,181.67/21,109.92
  6. Step 6: Final answer
    x = 15,025.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.