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Finding the Fourth Proportional to 21,613.62, 32,420.43 and 11,203.50

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Solution

The fourth proportional to 21,613.62, 32,420.43 and 11,203.50 is: 16,805.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,613.62 : 32,420.43 = 11,203.50 : x
  2. Step 2: Convert to fraction form
    21,613.62/32,420.43 = 11,203.50/x
  3. Step 3: Cross multiply
    21,613.62x = 32,420.43 × 11,203.50
  4. Step 4: Simplify right side
    21,613.62x = 363,222,287.51
  5. Step 5: Solve for x
    x = 363,222,287.51/21,613.62
  6. Step 6: Final answer
    x = 16,805.25

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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.