Home / 21,619.73-29,830.69-13,126.32

Finding the Fourth Proportional to 21,619.73, 29,830.69 and 13,126.32

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Solution

The fourth proportional to 21,619.73, 29,830.69 and 13,126.32 is: 18,111.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.73 : 29,830.69 = 13,126.32 : x
  2. Step 2: Convert to fraction form
    21,619.73/29,830.69 = 13,126.32/x
  3. Step 3: Cross multiply
    21,619.73x = 29,830.69 × 13,126.32
  4. Step 4: Simplify right side
    21,619.73x = 391,567,182.76
  5. Step 5: Solve for x
    x = 391,567,182.76/21,619.73
  6. Step 6: Final answer
    x = 18,111.57

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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.