Home / 21,454.31-29,608.59-13,503.35

Finding the Fourth Proportional to 21,454.31, 29,608.59 and 13,503.35

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Solution

The fourth proportional to 21,454.31, 29,608.59 and 13,503.35 is: 18,635.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,454.31 : 29,608.59 = 13,503.35 : x
  2. Step 2: Convert to fraction form
    21,454.31/29,608.59 = 13,503.35/x
  3. Step 3: Cross multiply
    21,454.31x = 29,608.59 × 13,503.35
  4. Step 4: Simplify right side
    21,454.31x = 399,815,005.73
  5. Step 5: Solve for x
    x = 399,815,005.73/21,454.31
  6. Step 6: Final answer
    x = 18,635.65

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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.