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Finding the Fourth Proportional to 30,405.15, 41,959.79 and 16,975.76

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Solution

The fourth proportional to 30,405.15, 41,959.79 and 16,975.76 is: 23,426.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,405.15 : 41,959.79 = 16,975.76 : x
  2. Step 2: Convert to fraction form
    30,405.15/41,959.79 = 16,975.76/x
  3. Step 3: Cross multiply
    30,405.15x = 41,959.79 × 16,975.76
  4. Step 4: Simplify right side
    30,405.15x = 712,299,030.01
  5. Step 5: Solve for x
    x = 712,299,030.01/30,405.15
  6. Step 6: Final answer
    x = 23,426.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.