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Finding the Fourth Proportional to 14,570.40, 21,855.60 and 9,645.60

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Solution

The fourth proportional to 14,570.40, 21,855.60 and 9,645.60 is: 14,468.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,570.40 : 21,855.60 = 9,645.60 : x
  2. Step 2: Convert to fraction form
    14,570.40/21,855.60 = 9,645.60/x
  3. Step 3: Cross multiply
    14,570.40x = 21,855.60 × 9,645.60
  4. Step 4: Simplify right side
    14,570.40x = 210,810,375.36
  5. Step 5: Solve for x
    x = 210,810,375.36/14,570.40
  6. Step 6: Final answer
    x = 14,468.40

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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.