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Finding the Fourth Proportional to 28,008.30, 42,000.30 and 11,362.80

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Solution

The fourth proportional to 28,008.30, 42,000.30 and 11,362.80 is: 17,039.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008.30 : 42,000.30 = 11,362.80 : x
  2. Step 2: Convert to fraction form
    28,008.30/42,000.30 = 11,362.80/x
  3. Step 3: Cross multiply
    28,008.30x = 42,000.30 × 11,362.80
  4. Step 4: Simplify right side
    28,008.30x = 477,241,008.84
  5. Step 5: Solve for x
    x = 477,241,008.84/28,008.30
  6. Step 6: Final answer
    x = 17,039.27

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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.