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Finding the Fourth Proportional to 28,600.21, 42,899.71 and 7,823.71

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Solution

The fourth proportional to 28,600.21, 42,899.71 and 7,823.71 is: 11,735.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,600.21 : 42,899.71 = 7,823.71 : x
  2. Step 2: Convert to fraction form
    28,600.21/42,899.71 = 7,823.71/x
  3. Step 3: Cross multiply
    28,600.21x = 42,899.71 × 7,823.71
  4. Step 4: Simplify right side
    28,600.21x = 335,634,890.12
  5. Step 5: Solve for x
    x = 335,634,890.12/28,600.21
  6. Step 6: Final answer
    x = 11,735.40

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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.