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Finding the Fourth Proportional to 30,661.50, 46,009.98 and 12,890.74

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Solution

The fourth proportional to 30,661.50, 46,009.98 and 12,890.74 is: 19,343.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,661.50 : 46,009.98 = 12,890.74 : x
  2. Step 2: Convert to fraction form
    30,661.50/46,009.98 = 12,890.74/x
  3. Step 3: Cross multiply
    30,661.50x = 46,009.98 × 12,890.74
  4. Step 4: Simplify right side
    30,661.50x = 593,102,689.59
  5. Step 5: Solve for x
    x = 593,102,689.59/30,661.50
  6. Step 6: Final answer
    x = 19,343.56

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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.