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Finding the Fourth Proportional to 7,981.02, 11,955.21 and 6,505.50

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Solution

The fourth proportional to 7,981.02, 11,955.21 and 6,505.50 is: 9,744.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.02 : 11,955.21 = 6,505.50 : x
  2. Step 2: Convert to fraction form
    7,981.02/11,955.21 = 6,505.50/x
  3. Step 3: Cross multiply
    7,981.02x = 11,955.21 × 6,505.50
  4. Step 4: Simplify right side
    7,981.02x = 77,774,618.66
  5. Step 5: Solve for x
    x = 77,774,618.66/7,981.02
  6. Step 6: Final answer
    x = 9,744.95

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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.