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Finding the Fourth Proportional to 18,705.13, 28,057.74 and 7,603.99

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Solution

The fourth proportional to 18,705.13, 28,057.74 and 7,603.99 is: 11,406.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.13 : 28,057.74 = 7,603.99 : x
  2. Step 2: Convert to fraction form
    18,705.13/28,057.74 = 7,603.99/x
  3. Step 3: Cross multiply
    18,705.13x = 28,057.74 × 7,603.99
  4. Step 4: Simplify right side
    18,705.13x = 213,350,774.38
  5. Step 5: Solve for x
    x = 213,350,774.38/18,705.13
  6. Step 6: Final answer
    x = 11,406.00

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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.