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Finding the Fourth Proportional to 12,457.13, 17,190.90 and 6,868.13

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Solution

The fourth proportional to 12,457.13, 17,190.90 and 6,868.13 is: 9,478.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.13 : 17,190.90 = 6,868.13 : x
  2. Step 2: Convert to fraction form
    12,457.13/17,190.90 = 6,868.13/x
  3. Step 3: Cross multiply
    12,457.13x = 17,190.90 × 6,868.13
  4. Step 4: Simplify right side
    12,457.13x = 118,069,250.06
  5. Step 5: Solve for x
    x = 118,069,250.06/12,457.13
  6. Step 6: Final answer
    x = 9,478.05

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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.