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Finding the Fourth Proportional to 12,457.96, 17,187.68 and 7,984.18

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Solution

The fourth proportional to 12,457.96, 17,187.68 and 7,984.18 is: 11,015.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.96 : 17,187.68 = 7,984.18 : x
  2. Step 2: Convert to fraction form
    12,457.96/17,187.68 = 7,984.18/x
  3. Step 3: Cross multiply
    12,457.96x = 17,187.68 × 7,984.18
  4. Step 4: Simplify right side
    12,457.96x = 137,229,522.45
  5. Step 5: Solve for x
    x = 137,229,522.45/12,457.96
  6. Step 6: Final answer
    x = 11,015.41

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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.