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Finding the Fourth Proportional to 30,959.84, 46,439.76 and 12,478.88

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Solution

The fourth proportional to 30,959.84, 46,439.76 and 12,478.88 is: 18,718.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,959.84 : 46,439.76 = 12,478.88 : x
  2. Step 2: Convert to fraction form
    30,959.84/46,439.76 = 12,478.88/x
  3. Step 3: Cross multiply
    30,959.84x = 46,439.76 × 12,478.88
  4. Step 4: Simplify right side
    30,959.84x = 579,515,960.07
  5. Step 5: Solve for x
    x = 579,515,960.07/30,959.84
  6. Step 6: Final answer
    x = 18,718.32

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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.