Home / 30,588.98-42,168.11-21,620.66

Finding the Fourth Proportional to 30,588.98, 42,168.11 and 21,620.66

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Solution

The fourth proportional to 30,588.98, 42,168.11 and 21,620.66 is: 29,804.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,588.98 : 42,168.11 = 21,620.66 : x
  2. Step 2: Convert to fraction form
    30,588.98/42,168.11 = 21,620.66/x
  3. Step 3: Cross multiply
    30,588.98x = 42,168.11 × 21,620.66
  4. Step 4: Simplify right side
    30,588.98x = 911,702,369.15
  5. Step 5: Solve for x
    x = 911,702,369.15/30,588.98
  6. Step 6: Final answer
    x = 29,804.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.