Home / 12,880.32-19,276.72-9,971.60

Finding the Fourth Proportional to 12,880.32, 19,276.72 and 9,971.60

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Solution

The fourth proportional to 12,880.32, 19,276.72 and 9,971.60 is: 14,923.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,880.32 : 19,276.72 = 9,971.60 : x
  2. Step 2: Convert to fraction form
    12,880.32/19,276.72 = 9,971.60/x
  3. Step 3: Cross multiply
    12,880.32x = 19,276.72 × 9,971.60
  4. Step 4: Simplify right side
    12,880.32x = 192,219,741.15
  5. Step 5: Solve for x
    x = 192,219,741.15/12,880.32
  6. Step 6: Final answer
    x = 14,923.52

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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.