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Finding the Fourth Proportional to 21,392.80, 32,048.40 and 11,528.80

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Solution

The fourth proportional to 21,392.80, 32,048.40 and 11,528.80 is: 17,271.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,392.80 : 32,048.40 = 11,528.80 : x
  2. Step 2: Convert to fraction form
    21,392.80/32,048.40 = 11,528.80/x
  3. Step 3: Cross multiply
    21,392.80x = 32,048.40 × 11,528.80
  4. Step 4: Simplify right side
    21,392.80x = 369,479,593.92
  5. Step 5: Solve for x
    x = 369,479,593.92/21,392.80
  6. Step 6: Final answer
    x = 17,271.21

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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.