Home / 21,203.20-31,808.40-11,339.80

Finding the Fourth Proportional to 21,203.20, 31,808.40 and 11,339.80

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Solution

The fourth proportional to 21,203.20, 31,808.40 and 11,339.80 is: 17,011.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.20 : 31,808.40 = 11,339.80 : x
  2. Step 2: Convert to fraction form
    21,203.20/31,808.40 = 11,339.80/x
  3. Step 3: Cross multiply
    21,203.20x = 31,808.40 × 11,339.80
  4. Step 4: Simplify right side
    21,203.20x = 360,700,894.32
  5. Step 5: Solve for x
    x = 360,700,894.32/21,203.20
  6. Step 6: Final answer
    x = 17,011.63

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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.