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Finding the Fourth Proportional to 19,321.60, 28,984.02 and 5,470.60

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Solution

The fourth proportional to 19,321.60, 28,984.02 and 5,470.60 is: 8,206.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,321.60 : 28,984.02 = 5,470.60 : x
  2. Step 2: Convert to fraction form
    19,321.60/28,984.02 = 5,470.60/x
  3. Step 3: Cross multiply
    19,321.60x = 28,984.02 × 5,470.60
  4. Step 4: Simplify right side
    19,321.60x = 158,559,979.81
  5. Step 5: Solve for x
    x = 158,559,979.81/19,321.60
  6. Step 6: Final answer
    x = 8,206.36

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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.