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Finding the Fourth Proportional to 16,986.40, 25,479.60 and 11,802.40

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Solution

The fourth proportional to 16,986.40, 25,479.60 and 11,802.40 is: 17,703.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,986.40 : 25,479.60 = 11,802.40 : x
  2. Step 2: Convert to fraction form
    16,986.40/25,479.60 = 11,802.40/x
  3. Step 3: Cross multiply
    16,986.40x = 25,479.60 × 11,802.40
  4. Step 4: Simplify right side
    16,986.40x = 300,720,431.04
  5. Step 5: Solve for x
    x = 300,720,431.04/16,986.40
  6. Step 6: Final answer
    x = 17,703.60

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1.5x scale

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.