Home / 21,029.60-31,544.40-20,223.20

Finding the Fourth Proportional to 21,029.60, 31,544.40 and 20,223.20

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Solution

The fourth proportional to 21,029.60, 31,544.40 and 20,223.20 is: 30,334.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029.60 : 31,544.40 = 20,223.20 : x
  2. Step 2: Convert to fraction form
    21,029.60/31,544.40 = 20,223.20/x
  3. Step 3: Cross multiply
    21,029.60x = 31,544.40 × 20,223.20
  4. Step 4: Simplify right side
    21,029.60x = 637,928,710.08
  5. Step 5: Solve for x
    x = 637,928,710.08/21,029.60
  6. Step 6: Final answer
    x = 30,334.80

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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.