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Finding the Fourth Proportional to 12,603.68, 18,904.74 and 5,581.65

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Solution

The fourth proportional to 12,603.68, 18,904.74 and 5,581.65 is: 8,372.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.68 : 18,904.74 = 5,581.65 : x
  2. Step 2: Convert to fraction form
    12,603.68/18,904.74 = 5,581.65/x
  3. Step 3: Cross multiply
    12,603.68x = 18,904.74 × 5,581.65
  4. Step 4: Simplify right side
    12,603.68x = 105,519,642.02
  5. Step 5: Solve for x
    x = 105,519,642.02/12,603.68
  6. Step 6: Final answer
    x = 8,372.13

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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.