Home / 21,538.59-29,710.83-13,458.21

Finding the Fourth Proportional to 21,538.59, 29,710.83 and 13,458.21

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Solution

The fourth proportional to 21,538.59, 29,710.83 and 13,458.21 is: 18,564.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,538.59 : 29,710.83 = 13,458.21 : x
  2. Step 2: Convert to fraction form
    21,538.59/29,710.83 = 13,458.21/x
  3. Step 3: Cross multiply
    21,538.59x = 29,710.83 × 13,458.21
  4. Step 4: Simplify right side
    21,538.59x = 399,854,589.41
  5. Step 5: Solve for x
    x = 399,854,589.41/21,538.59
  6. Step 6: Final answer
    x = 18,564.57

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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.