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Finding the Fourth Proportional to 21,858.34, 32,762.68 and 19,220.74

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Solution

The fourth proportional to 21,858.34, 32,762.68 and 19,220.74 is: 28,809.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.34 : 32,762.68 = 19,220.74 : x
  2. Step 2: Convert to fraction form
    21,858.34/32,762.68 = 19,220.74/x
  3. Step 3: Cross multiply
    21,858.34x = 32,762.68 × 19,220.74
  4. Step 4: Simplify right side
    21,858.34x = 629,722,953.98
  5. Step 5: Solve for x
    x = 629,722,953.98/21,858.34
  6. Step 6: Final answer
    x = 28,809.28

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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.