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Finding the Fourth Proportional to 28,538.88, 42,792.93 and 8,812.14

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Solution

The fourth proportional to 28,538.88, 42,792.93 and 8,812.14 is: 13,213.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,538.88 : 42,792.93 = 8,812.14 : x
  2. Step 2: Convert to fraction form
    28,538.88/42,792.93 = 8,812.14/x
  3. Step 3: Cross multiply
    28,538.88x = 42,792.93 × 8,812.14
  4. Step 4: Simplify right side
    28,538.88x = 377,097,290.17
  5. Step 5: Solve for x
    x = 377,097,290.17/28,538.88
  6. Step 6: Final answer
    x = 13,213.46

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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.