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Finding the Fourth Proportional to 7,281.88, 10,913.70 and 3,116.98

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Solution

The fourth proportional to 7,281.88, 10,913.70 and 3,116.98 is: 4,671.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,281.88 : 10,913.70 = 3,116.98 : x
  2. Step 2: Convert to fraction form
    7,281.88/10,913.70 = 3,116.98/x
  3. Step 3: Cross multiply
    7,281.88x = 10,913.70 × 3,116.98
  4. Step 4: Simplify right side
    7,281.88x = 34,017,784.63
  5. Step 5: Solve for x
    x = 34,017,784.63/7,281.88
  6. Step 6: Final answer
    x = 4,671.57

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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.