Home / 20,867.36-28,798.31-11,435.91

Finding the Fourth Proportional to 20,867.36, 28,798.31 and 11,435.91

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Solution

The fourth proportional to 20,867.36, 28,798.31 and 11,435.91 is: 15,782.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.36 : 28,798.31 = 11,435.91 : x
  2. Step 2: Convert to fraction form
    20,867.36/28,798.31 = 11,435.91/x
  3. Step 3: Cross multiply
    20,867.36x = 28,798.31 × 11,435.91
  4. Step 4: Simplify right side
    20,867.36x = 329,334,824.13
  5. Step 5: Solve for x
    x = 329,334,824.13/20,867.36
  6. Step 6: Final answer
    x = 15,782.30

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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.