Home / 21,785.85-30,051.41-13,387.77

Finding the Fourth Proportional to 21,785.85, 30,051.41 and 13,387.77

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Solution

The fourth proportional to 21,785.85, 30,051.41 and 13,387.77 is: 18,467.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,785.85 : 30,051.41 = 13,387.77 : x
  2. Step 2: Convert to fraction form
    21,785.85/30,051.41 = 13,387.77/x
  3. Step 3: Cross multiply
    21,785.85x = 30,051.41 × 13,387.77
  4. Step 4: Simplify right side
    21,785.85x = 402,321,298.32
  5. Step 5: Solve for x
    x = 402,321,298.32/21,785.85
  6. Step 6: Final answer
    x = 18,467.09

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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.