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Finding the Fourth Proportional to 6,312.54, 8,705.40 and 4,989.41

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Solution

The fourth proportional to 6,312.54, 8,705.40 and 4,989.41 is: 6,880.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,312.54 : 8,705.40 = 4,989.41 : x
  2. Step 2: Convert to fraction form
    6,312.54/8,705.40 = 4,989.41/x
  3. Step 3: Cross multiply
    6,312.54x = 8,705.40 × 4,989.41
  4. Step 4: Simplify right side
    6,312.54x = 43,434,809.81
  5. Step 5: Solve for x
    x = 43,434,809.81/6,312.54
  6. Step 6: Final answer
    x = 6,880.72

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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.