Home / 15,742.36-21,704.28-12,899.26

Finding the Fourth Proportional to 15,742.36, 21,704.28 and 12,899.26

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Solution

The fourth proportional to 15,742.36, 21,704.28 and 12,899.26 is: 17,784.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.36 : 21,704.28 = 12,899.26 : x
  2. Step 2: Convert to fraction form
    15,742.36/21,704.28 = 12,899.26/x
  3. Step 3: Cross multiply
    15,742.36x = 21,704.28 × 12,899.26
  4. Step 4: Simplify right side
    15,742.36x = 279,969,150.83
  5. Step 5: Solve for x
    x = 279,969,150.83/15,742.36
  6. Step 6: Final answer
    x = 17,784.45

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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.