Home / 21,236.28-31,860.18-6,445.68

Finding the Fourth Proportional to 21,236.28, 31,860.18 and 6,445.68

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Solution

The fourth proportional to 21,236.28, 31,860.18 and 6,445.68 is: 9,670.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,236.28 : 31,860.18 = 6,445.68 : x
  2. Step 2: Convert to fraction form
    21,236.28/31,860.18 = 6,445.68/x
  3. Step 3: Cross multiply
    21,236.28x = 31,860.18 × 6,445.68
  4. Step 4: Simplify right side
    21,236.28x = 205,360,525.02
  5. Step 5: Solve for x
    x = 205,360,525.02/21,236.28
  6. Step 6: Final answer
    x = 9,670.27

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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.