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Finding the Fourth Proportional to 30,807.90, 46,218.60 and 12,087.90

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Solution

The fourth proportional to 30,807.90, 46,218.60 and 12,087.90 is: 18,134.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,807.90 : 46,218.60 = 12,087.90 : x
  2. Step 2: Convert to fraction form
    30,807.90/46,218.60 = 12,087.90/x
  3. Step 3: Cross multiply
    30,807.90x = 46,218.60 × 12,087.90
  4. Step 4: Simplify right side
    30,807.90x = 558,685,814.94
  5. Step 5: Solve for x
    x = 558,685,814.94/30,807.90
  6. Step 6: Final answer
    x = 18,134.50

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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.