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Finding the Fourth Proportional to 6,490.84, 8,957.40 and 4,916.20

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Solution

The fourth proportional to 6,490.84, 8,957.40 and 4,916.20 is: 6,784.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,490.84 : 8,957.40 = 4,916.20 : x
  2. Step 2: Convert to fraction form
    6,490.84/8,957.40 = 4,916.20/x
  3. Step 3: Cross multiply
    6,490.84x = 8,957.40 × 4,916.20
  4. Step 4: Simplify right side
    6,490.84x = 44,036,369.88
  5. Step 5: Solve for x
    x = 44,036,369.88/6,490.84
  6. Step 6: Final answer
    x = 6,784.39

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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.