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Finding the Fourth Proportional to 21,556.56, 32,326.56 and 8,407.20

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Solution

The fourth proportional to 21,556.56, 32,326.56 and 8,407.20 is: 12,607.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,556.56 : 32,326.56 = 8,407.20 : x
  2. Step 2: Convert to fraction form
    21,556.56/32,326.56 = 8,407.20/x
  3. Step 3: Cross multiply
    21,556.56x = 32,326.56 × 8,407.20
  4. Step 4: Simplify right side
    21,556.56x = 271,775,855.23
  5. Step 5: Solve for x
    x = 271,775,855.23/21,556.56
  6. Step 6: Final answer
    x = 12,607.57

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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.