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Finding the Fourth Proportional to 21,653, 32,311.93 and 19,320.20

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Solution

The fourth proportional to 21,653, 32,311.93 and 19,320.20 is: 28,830.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653 : 32,311.93 = 19,320.20 : x
  2. Step 2: Convert to fraction form
    21,653/32,311.93 = 19,320.20/x
  3. Step 3: Cross multiply
    21,653x = 32,311.93 × 19,320.20
  4. Step 4: Simplify right side
    21,653x = 624,272,949.99
  5. Step 5: Solve for x
    x = 624,272,949.99/21,653
  6. Step 6: Final answer
    x = 28,830.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.