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Finding the Fourth Proportional to 6,471.84, 8,929.98 and 3,638.40

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Solution

The fourth proportional to 6,471.84, 8,929.98 and 3,638.40 is: 5,020.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,471.84 : 8,929.98 = 3,638.40 : x
  2. Step 2: Convert to fraction form
    6,471.84/8,929.98 = 3,638.40/x
  3. Step 3: Cross multiply
    6,471.84x = 8,929.98 × 3,638.40
  4. Step 4: Simplify right side
    6,471.84x = 32,490,839.23
  5. Step 5: Solve for x
    x = 32,490,839.23/6,471.84
  6. Step 6: Final answer
    x = 5,020.34

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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.