Home / 21,009.20-31,528.20-9,330.80

Finding the Fourth Proportional to 21,009.20, 31,528.20 and 9,330.80

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Solution

The fourth proportional to 21,009.20, 31,528.20 and 9,330.80 is: 14,002.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.20 : 31,528.20 = 9,330.80 : x
  2. Step 2: Convert to fraction form
    21,009.20/31,528.20 = 9,330.80/x
  3. Step 3: Cross multiply
    21,009.20x = 31,528.20 × 9,330.80
  4. Step 4: Simplify right side
    21,009.20x = 294,183,328.56
  5. Step 5: Solve for x
    x = 294,183,328.56/21,009.20
  6. Step 6: Final answer
    x = 14,002.60

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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.