Home / 21,458.40-29,612.54-13,074.90

Finding the Fourth Proportional to 21,458.40, 29,612.54 and 13,074.90

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Solution

The fourth proportional to 21,458.40, 29,612.54 and 13,074.90 is: 18,043.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,458.40 : 29,612.54 = 13,074.90 : x
  2. Step 2: Convert to fraction form
    21,458.40/29,612.54 = 13,074.90/x
  3. Step 3: Cross multiply
    21,458.40x = 29,612.54 × 13,074.90
  4. Step 4: Simplify right side
    21,458.40x = 387,180,999.25
  5. Step 5: Solve for x
    x = 387,180,999.25/21,458.40
  6. Step 6: Final answer
    x = 18,043.33

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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.