Home / 21,213.21-31,803.30-9,518.25

Finding the Fourth Proportional to 21,213.21, 31,803.30 and 9,518.25

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Solution

The fourth proportional to 21,213.21, 31,803.30 and 9,518.25 is: 14,269.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.21 : 31,803.30 = 9,518.25 : x
  2. Step 2: Convert to fraction form
    21,213.21/31,803.30 = 9,518.25/x
  3. Step 3: Cross multiply
    21,213.21x = 31,803.30 × 9,518.25
  4. Step 4: Simplify right side
    21,213.21x = 302,711,760.23
  5. Step 5: Solve for x
    x = 302,711,760.23/21,213.21
  6. Step 6: Final answer
    x = 14,269.96

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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.