Home / 20,821.63-31,232.35-5,239.26

Finding the Fourth Proportional to 20,821.63, 31,232.35 and 5,239.26

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Solution

The fourth proportional to 20,821.63, 31,232.35 and 5,239.26 is: 7,858.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.63 : 31,232.35 = 5,239.26 : x
  2. Step 2: Convert to fraction form
    20,821.63/31,232.35 = 5,239.26/x
  3. Step 3: Cross multiply
    20,821.63x = 31,232.35 × 5,239.26
  4. Step 4: Simplify right side
    20,821.63x = 163,634,402.06
  5. Step 5: Solve for x
    x = 163,634,402.06/20,821.63
  6. Step 6: Final answer
    x = 7,858.87

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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.