Home / 21,247.27-31,870.87-10,120.21

Finding the Fourth Proportional to 21,247.27, 31,870.87 and 10,120.21

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Solution

The fourth proportional to 21,247.27, 31,870.87 and 10,120.21 is: 15,180.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.27 : 31,870.87 = 10,120.21 : x
  2. Step 2: Convert to fraction form
    21,247.27/31,870.87 = 10,120.21/x
  3. Step 3: Cross multiply
    21,247.27x = 31,870.87 × 10,120.21
  4. Step 4: Simplify right side
    21,247.27x = 322,539,897.28
  5. Step 5: Solve for x
    x = 322,539,897.28/21,247.27
  6. Step 6: Final answer
    x = 15,180.30

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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.