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Finding the Fourth Proportional to 8,490.51, 11,719.08 and 4,905.99

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Solution

The fourth proportional to 8,490.51, 11,719.08 and 4,905.99 is: 6,771.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.51 : 11,719.08 = 4,905.99 : x
  2. Step 2: Convert to fraction form
    8,490.51/11,719.08 = 4,905.99/x
  3. Step 3: Cross multiply
    8,490.51x = 11,719.08 × 4,905.99
  4. Step 4: Simplify right side
    8,490.51x = 57,493,689.29
  5. Step 5: Solve for x
    x = 57,493,689.29/8,490.51
  6. Step 6: Final answer
    x = 6,771.52

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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.