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Finding the Fourth Proportional to 6,970.98, 9,621.50 and 5,455.53

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Solution

The fourth proportional to 6,970.98, 9,621.50 and 5,455.53 is: 7,529.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,970.98 : 9,621.50 = 5,455.53 : x
  2. Step 2: Convert to fraction form
    6,970.98/9,621.50 = 5,455.53/x
  3. Step 3: Cross multiply
    6,970.98x = 9,621.50 × 5,455.53
  4. Step 4: Simplify right side
    6,970.98x = 52,490,354.62
  5. Step 5: Solve for x
    x = 52,490,354.62/6,970.98
  6. Step 6: Final answer
    x = 7,529.84

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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.