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Finding the Fourth Proportional to 11,401.04, 15,696.84 and 9,928.40

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Solution

The fourth proportional to 11,401.04, 15,696.84 and 9,928.40 is: 13,669.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,401.04 : 15,696.84 = 9,928.40 : x
  2. Step 2: Convert to fraction form
    11,401.04/15,696.84 = 9,928.40/x
  3. Step 3: Cross multiply
    11,401.04x = 15,696.84 × 9,928.40
  4. Step 4: Simplify right side
    11,401.04x = 155,844,506.26
  5. Step 5: Solve for x
    x = 155,844,506.26/11,401.04
  6. Step 6: Final answer
    x = 13,669.32

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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.