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Finding the Fourth Proportional to 12,543.80, 17,300.45 and 10,661.63

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Solution

The fourth proportional to 12,543.80, 17,300.45 and 10,661.63 is: 14,704.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.80 : 17,300.45 = 10,661.63 : x
  2. Step 2: Convert to fraction form
    12,543.80/17,300.45 = 10,661.63/x
  3. Step 3: Cross multiply
    12,543.80x = 17,300.45 × 10,661.63
  4. Step 4: Simplify right side
    12,543.80x = 184,450,856.92
  5. Step 5: Solve for x
    x = 184,450,856.92/12,543.80
  6. Step 6: Final answer
    x = 14,704.55

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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.