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Finding the Fourth Proportional to 9,936, 14,908.08 and 4,386.40

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Solution

The fourth proportional to 9,936, 14,908.08 and 4,386.40 is: 6,581.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,936 : 14,908.08 = 4,386.40 : x
  2. Step 2: Convert to fraction form
    9,936/14,908.08 = 4,386.40/x
  3. Step 3: Cross multiply
    9,936x = 14,908.08 × 4,386.40
  4. Step 4: Simplify right side
    9,936x = 65,392,802.11
  5. Step 5: Solve for x
    x = 65,392,802.11/9,936
  6. Step 6: Final answer
    x = 6,581.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.