Home / 21,619.52-29,830.72-13,230.08

Finding the Fourth Proportional to 21,619.52, 29,830.72 and 13,230.08

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Solution

The fourth proportional to 21,619.52, 29,830.72 and 13,230.08 is: 18,254.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.52 : 29,830.72 = 13,230.08 : x
  2. Step 2: Convert to fraction form
    21,619.52/29,830.72 = 13,230.08/x
  3. Step 3: Cross multiply
    21,619.52x = 29,830.72 × 13,230.08
  4. Step 4: Simplify right side
    21,619.52x = 394,662,812.06
  5. Step 5: Solve for x
    x = 394,662,812.06/21,619.52
  6. Step 6: Final answer
    x = 18,254.93

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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.