Home / 15,703.56-21,690.10-11,742.28

Finding the Fourth Proportional to 15,703.56, 21,690.10 and 11,742.28

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Solution

The fourth proportional to 15,703.56, 21,690.10 and 11,742.28 is: 16,218.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,703.56 : 21,690.10 = 11,742.28 : x
  2. Step 2: Convert to fraction form
    15,703.56/21,690.10 = 11,742.28/x
  3. Step 3: Cross multiply
    15,703.56x = 21,690.10 × 11,742.28
  4. Step 4: Simplify right side
    15,703.56x = 254,691,227.43
  5. Step 5: Solve for x
    x = 254,691,227.43/15,703.56
  6. Step 6: Final answer
    x = 16,218.69

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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.