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Finding the Fourth Proportional to 18,671.46, 28,012.05 and 6,985.59

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Solution

The fourth proportional to 18,671.46, 28,012.05 and 6,985.59 is: 10,480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.46 : 28,012.05 = 6,985.59 : x
  2. Step 2: Convert to fraction form
    18,671.46/28,012.05 = 6,985.59/x
  3. Step 3: Cross multiply
    18,671.46x = 28,012.05 × 6,985.59
  4. Step 4: Simplify right side
    18,671.46x = 195,680,696.36
  5. Step 5: Solve for x
    x = 195,680,696.36/18,671.46
  6. Step 6: Final answer
    x = 10,480.20

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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.