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Finding the Fourth Proportional to 6,487.74, 8,968.99 and 6,428.51

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Solution

The fourth proportional to 6,487.74, 8,968.99 and 6,428.51 is: 8,887.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,487.74 : 8,968.99 = 6,428.51 : x
  2. Step 2: Convert to fraction form
    6,487.74/8,968.99 = 6,428.51/x
  3. Step 3: Cross multiply
    6,487.74x = 8,968.99 × 6,428.51
  4. Step 4: Simplify right side
    6,487.74x = 57,657,241.90
  5. Step 5: Solve for x
    x = 57,657,241.90/6,487.74
  6. Step 6: Final answer
    x = 8,887.11

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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.