Home / 21,106.70-29,131.14-13,562.46

Finding the Fourth Proportional to 21,106.70, 29,131.14 and 13,562.46

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Solution

The fourth proportional to 21,106.70, 29,131.14 and 13,562.46 is: 18,718.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.70 : 29,131.14 = 13,562.46 : x
  2. Step 2: Convert to fraction form
    21,106.70/29,131.14 = 13,562.46/x
  3. Step 3: Cross multiply
    21,106.70x = 29,131.14 × 13,562.46
  4. Step 4: Simplify right side
    21,106.70x = 395,089,921.00
  5. Step 5: Solve for x
    x = 395,089,921.00/21,106.70
  6. Step 6: Final answer
    x = 18,718.70

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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.