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Finding the Fourth Proportional to 30,868.01, 42,596.99 and 18,120.99

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Solution

The fourth proportional to 30,868.01, 42,596.99 and 18,120.99 is: 25,006.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,868.01 : 42,596.99 = 18,120.99 : x
  2. Step 2: Convert to fraction form
    30,868.01/42,596.99 = 18,120.99/x
  3. Step 3: Cross multiply
    30,868.01x = 42,596.99 × 18,120.99
  4. Step 4: Simplify right side
    30,868.01x = 771,899,539.22
  5. Step 5: Solve for x
    x = 771,899,539.22/30,868.01
  6. Step 6: Final answer
    x = 25,006.45

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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.