Home / 21,033.20-31,549.80-19,089.20

Finding the Fourth Proportional to 21,033.20, 31,549.80 and 19,089.20

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Solution

The fourth proportional to 21,033.20, 31,549.80 and 19,089.20 is: 28,633.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,033.20 : 31,549.80 = 19,089.20 : x
  2. Step 2: Convert to fraction form
    21,033.20/31,549.80 = 19,089.20/x
  3. Step 3: Cross multiply
    21,033.20x = 31,549.80 × 19,089.20
  4. Step 4: Simplify right side
    21,033.20x = 602,260,442.16
  5. Step 5: Solve for x
    x = 602,260,442.16/21,033.20
  6. Step 6: Final answer
    x = 28,633.80

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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.