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Finding the Fourth Proportional to 12,543.75, 17,312.94 and 7,237.85

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Solution

The fourth proportional to 12,543.75, 17,312.94 and 7,237.85 is: 9,989.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.75 : 17,312.94 = 7,237.85 : x
  2. Step 2: Convert to fraction form
    12,543.75/17,312.94 = 7,237.85/x
  3. Step 3: Cross multiply
    12,543.75x = 17,312.94 × 7,237.85
  4. Step 4: Simplify right side
    12,543.75x = 125,308,376.21
  5. Step 5: Solve for x
    x = 125,308,376.21/12,543.75
  6. Step 6: Final answer
    x = 9,989.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.