Home / 21,403.58-29,538.88-13,853.57

Finding the Fourth Proportional to 21,403.58, 29,538.88 and 13,853.57

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Solution

The fourth proportional to 21,403.58, 29,538.88 and 13,853.57 is: 19,119.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,403.58 : 29,538.88 = 13,853.57 : x
  2. Step 2: Convert to fraction form
    21,403.58/29,538.88 = 13,853.57/x
  3. Step 3: Cross multiply
    21,403.58x = 29,538.88 × 13,853.57
  4. Step 4: Simplify right side
    21,403.58x = 409,218,759.47
  5. Step 5: Solve for x
    x = 409,218,759.47/21,403.58
  6. Step 6: Final answer
    x = 19,119.18

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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.