Home / 21,478.20-32,303.70-19,231.80

Finding the Fourth Proportional to 21,478.20, 32,303.70 and 19,231.80

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Solution

The fourth proportional to 21,478.20, 32,303.70 and 19,231.80 is: 28,925.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.20 : 32,303.70 = 19,231.80 : x
  2. Step 2: Convert to fraction form
    21,478.20/32,303.70 = 19,231.80/x
  3. Step 3: Cross multiply
    21,478.20x = 32,303.70 × 19,231.80
  4. Step 4: Simplify right side
    21,478.20x = 621,258,297.66
  5. Step 5: Solve for x
    x = 621,258,297.66/21,478.20
  6. Step 6: Final answer
    x = 28,925.06

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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.