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Finding the Fourth Proportional to 30,081.60, 45,129.69 and 9,021.60

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Solution

The fourth proportional to 30,081.60, 45,129.69 and 9,021.60 is: 13,534.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,081.60 : 45,129.69 = 9,021.60 : x
  2. Step 2: Convert to fraction form
    30,081.60/45,129.69 = 9,021.60/x
  3. Step 3: Cross multiply
    30,081.60x = 45,129.69 × 9,021.60
  4. Step 4: Simplify right side
    30,081.60x = 407,142,011.30
  5. Step 5: Solve for x
    x = 407,142,011.30/30,081.60
  6. Step 6: Final answer
    x = 13,534.59

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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.