Home / 13,690.06-18,892.16-7,722.78

Finding the Fourth Proportional to 13,690.06, 18,892.16 and 7,722.78

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Solution

The fourth proportional to 13,690.06, 18,892.16 and 7,722.78 is: 10,657.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.06 : 18,892.16 = 7,722.78 : x
  2. Step 2: Convert to fraction form
    13,690.06/18,892.16 = 7,722.78/x
  3. Step 3: Cross multiply
    13,690.06x = 18,892.16 × 7,722.78
  4. Step 4: Simplify right side
    13,690.06x = 145,899,995.40
  5. Step 5: Solve for x
    x = 145,899,995.40/13,690.06
  6. Step 6: Final answer
    x = 10,657.37

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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.