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Finding the Fourth Proportional to 30,319.16, 45,485.03 and 12,789.14

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Solution

The fourth proportional to 30,319.16, 45,485.03 and 12,789.14 is: 19,186.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,319.16 : 45,485.03 = 12,789.14 : x
  2. Step 2: Convert to fraction form
    30,319.16/45,485.03 = 12,789.14/x
  3. Step 3: Cross multiply
    30,319.16x = 45,485.03 × 12,789.14
  4. Step 4: Simplify right side
    30,319.16x = 581,714,221.12
  5. Step 5: Solve for x
    x = 581,714,221.12/30,319.16
  6. Step 6: Final answer
    x = 19,186.36

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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.