Home / 21,290.16-29,379.84-11,858.52

Finding the Fourth Proportional to 21,290.16, 29,379.84 and 11,858.52

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Solution

The fourth proportional to 21,290.16, 29,379.84 and 11,858.52 is: 16,364.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.16 : 29,379.84 = 11,858.52 : x
  2. Step 2: Convert to fraction form
    21,290.16/29,379.84 = 11,858.52/x
  3. Step 3: Cross multiply
    21,290.16x = 29,379.84 × 11,858.52
  4. Step 4: Simplify right side
    21,290.16x = 348,401,420.24
  5. Step 5: Solve for x
    x = 348,401,420.24/21,290.16
  6. Step 6: Final answer
    x = 16,364.43

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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.