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Finding the Fourth Proportional to 21,603.33, 32,403.92 and 8,458.11

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Solution

The fourth proportional to 21,603.33, 32,403.92 and 8,458.11 is: 12,686.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.33 : 32,403.92 = 8,458.11 : x
  2. Step 2: Convert to fraction form
    21,603.33/32,403.92 = 8,458.11/x
  3. Step 3: Cross multiply
    21,603.33x = 32,403.92 × 8,458.11
  4. Step 4: Simplify right side
    21,603.33x = 274,075,877.50
  5. Step 5: Solve for x
    x = 274,075,877.50/21,603.33
  6. Step 6: Final answer
    x = 12,686.74

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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.