Home / 21,211.80-29,272.44-12,259.32

Finding the Fourth Proportional to 21,211.80, 29,272.44 and 12,259.32

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Solution

The fourth proportional to 21,211.80, 29,272.44 and 12,259.32 is: 16,917.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.80 : 29,272.44 = 12,259.32 : x
  2. Step 2: Convert to fraction form
    21,211.80/29,272.44 = 12,259.32/x
  3. Step 3: Cross multiply
    21,211.80x = 29,272.44 × 12,259.32
  4. Step 4: Simplify right side
    21,211.80x = 358,860,209.14
  5. Step 5: Solve for x
    x = 358,860,209.14/21,211.80
  6. Step 6: Final answer
    x = 16,917.95

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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.