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Finding the Fourth Proportional to 9,878.40, 14,817.60 and 9,662.40

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Solution

The fourth proportional to 9,878.40, 14,817.60 and 9,662.40 is: 14,493.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,878.40 : 14,817.60 = 9,662.40 : x
  2. Step 2: Convert to fraction form
    9,878.40/14,817.60 = 9,662.40/x
  3. Step 3: Cross multiply
    9,878.40x = 14,817.60 × 9,662.40
  4. Step 4: Simplify right side
    9,878.40x = 143,173,578.24
  5. Step 5: Solve for x
    x = 143,173,578.24/9,878.40
  6. Step 6: Final answer
    x = 14,493.60

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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.