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Finding the Fourth Proportional to 28,821.04, 43,142.04 and 15,640.72

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Solution

The fourth proportional to 28,821.04, 43,142.04 and 15,640.72 is: 23,412.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,821.04 : 43,142.04 = 15,640.72 : x
  2. Step 2: Convert to fraction form
    28,821.04/43,142.04 = 15,640.72/x
  3. Step 3: Cross multiply
    28,821.04x = 43,142.04 × 15,640.72
  4. Step 4: Simplify right side
    28,821.04x = 674,772,567.87
  5. Step 5: Solve for x
    x = 674,772,567.87/28,821.04
  6. Step 6: Final answer
    x = 23,412.50

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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.