Home / 21,685.04-29,906.60-14,128.52

Finding the Fourth Proportional to 21,685.04, 29,906.60 and 14,128.52

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Solution

The fourth proportional to 21,685.04, 29,906.60 and 14,128.52 is: 19,485.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,685.04 : 29,906.60 = 14,128.52 : x
  2. Step 2: Convert to fraction form
    21,685.04/29,906.60 = 14,128.52/x
  3. Step 3: Cross multiply
    21,685.04x = 29,906.60 × 14,128.52
  4. Step 4: Simplify right side
    21,685.04x = 422,535,996.23
  5. Step 5: Solve for x
    x = 422,535,996.23/21,685.04
  6. Step 6: Final answer
    x = 19,485.14

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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.