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Finding the Fourth Proportional to 21,360.80, 32,002.80 and 18,288.80

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Solution

The fourth proportional to 21,360.80, 32,002.80 and 18,288.80 is: 27,400.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,360.80 : 32,002.80 = 18,288.80 : x
  2. Step 2: Convert to fraction form
    21,360.80/32,002.80 = 18,288.80/x
  3. Step 3: Cross multiply
    21,360.80x = 32,002.80 × 18,288.80
  4. Step 4: Simplify right side
    21,360.80x = 585,292,808.64
  5. Step 5: Solve for x
    x = 585,292,808.64/21,360.80
  6. Step 6: Final answer
    x = 27,400.32

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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.