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Finding the Fourth Proportional to 9,916.63, 13,684.95 and 5,440.40

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Solution

The fourth proportional to 9,916.63, 13,684.95 and 5,440.40 is: 7,507.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,916.63 : 13,684.95 = 5,440.40 : x
  2. Step 2: Convert to fraction form
    9,916.63/13,684.95 = 5,440.40/x
  3. Step 3: Cross multiply
    9,916.63x = 13,684.95 × 5,440.40
  4. Step 4: Simplify right side
    9,916.63x = 74,451,584.87
  5. Step 5: Solve for x
    x = 74,451,584.87/9,916.63
  6. Step 6: Final answer
    x = 7,507.75

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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.