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Finding the Fourth Proportional to 30,866.80, 46,300.20 and 8,680.90

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Solution

The fourth proportional to 30,866.80, 46,300.20 and 8,680.90 is: 13,021.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,866.80 : 46,300.20 = 8,680.90 : x
  2. Step 2: Convert to fraction form
    30,866.80/46,300.20 = 8,680.90/x
  3. Step 3: Cross multiply
    30,866.80x = 46,300.20 × 8,680.90
  4. Step 4: Simplify right side
    30,866.80x = 401,927,406.18
  5. Step 5: Solve for x
    x = 401,927,406.18/30,866.80
  6. Step 6: Final answer
    x = 13,021.35

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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.