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Finding the Fourth Proportional to 9,409.77, 12,985.43 and 5,217.93

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Solution

The fourth proportional to 9,409.77, 12,985.43 and 5,217.93 is: 7,200.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,409.77 : 12,985.43 = 5,217.93 : x
  2. Step 2: Convert to fraction form
    9,409.77/12,985.43 = 5,217.93/x
  3. Step 3: Cross multiply
    9,409.77x = 12,985.43 × 5,217.93
  4. Step 4: Simplify right side
    9,409.77x = 67,757,038.67
  5. Step 5: Solve for x
    x = 67,757,038.67/9,409.77
  6. Step 6: Final answer
    x = 7,200.71

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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.