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Finding the Fourth Proportional to 30,988.45, 46,485.97 and 9,920.95

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Solution

The fourth proportional to 30,988.45, 46,485.97 and 9,920.95 is: 14,882.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,988.45 : 46,485.97 = 9,920.95 : x
  2. Step 2: Convert to fraction form
    30,988.45/46,485.97 = 9,920.95/x
  3. Step 3: Cross multiply
    30,988.45x = 46,485.97 × 9,920.95
  4. Step 4: Simplify right side
    30,988.45x = 461,185,125.09
  5. Step 5: Solve for x
    x = 461,185,125.09/30,988.45
  6. Step 6: Final answer
    x = 14,882.49

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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.