Home / 21,289.99-31,921.08-10,196.32

Finding the Fourth Proportional to 21,289.99, 31,921.08 and 10,196.32

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Solution

The fourth proportional to 21,289.99, 31,921.08 and 10,196.32 is: 15,287.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.99 : 31,921.08 = 10,196.32 : x
  2. Step 2: Convert to fraction form
    21,289.99/31,921.08 = 10,196.32/x
  3. Step 3: Cross multiply
    21,289.99x = 31,921.08 × 10,196.32
  4. Step 4: Simplify right side
    21,289.99x = 325,477,546.43
  5. Step 5: Solve for x
    x = 325,477,546.43/21,289.99
  6. Step 6: Final answer
    x = 15,287.82

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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.