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Finding the Fourth Proportional to 9,369.93, 12,931.43 and 5,391.21

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Solution

The fourth proportional to 9,369.93, 12,931.43 and 5,391.21 is: 7,440.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,369.93 : 12,931.43 = 5,391.21 : x
  2. Step 2: Convert to fraction form
    9,369.93/12,931.43 = 5,391.21/x
  3. Step 3: Cross multiply
    9,369.93x = 12,931.43 × 5,391.21
  4. Step 4: Simplify right side
    9,369.93x = 69,716,027.77
  5. Step 5: Solve for x
    x = 69,716,027.77/9,369.93
  6. Step 6: Final answer
    x = 7,440.40

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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.