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Finding the Fourth Proportional to 15,856.40, 23,784.60 and 8,080.40

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Solution

The fourth proportional to 15,856.40, 23,784.60 and 8,080.40 is: 12,120.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.40 : 23,784.60 = 8,080.40 : x
  2. Step 2: Convert to fraction form
    15,856.40/23,784.60 = 8,080.40/x
  3. Step 3: Cross multiply
    15,856.40x = 23,784.60 × 8,080.40
  4. Step 4: Simplify right side
    15,856.40x = 192,189,081.84
  5. Step 5: Solve for x
    x = 192,189,081.84/15,856.40
  6. Step 6: Final answer
    x = 12,120.60

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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.