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Finding the Fourth Proportional to 30,612.09, 45,918.63 and 8,425.32

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Solution

The fourth proportional to 30,612.09, 45,918.63 and 8,425.32 is: 12,638.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,612.09 : 45,918.63 = 8,425.32 : x
  2. Step 2: Convert to fraction form
    30,612.09/45,918.63 = 8,425.32/x
  3. Step 3: Cross multiply
    30,612.09x = 45,918.63 × 8,425.32
  4. Step 4: Simplify right side
    30,612.09x = 386,879,151.71
  5. Step 5: Solve for x
    x = 386,879,151.71/30,612.09
  6. Step 6: Final answer
    x = 12,638.12

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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.