Home / 21,128.45-31,708.62-14,448.99

Finding the Fourth Proportional to 21,128.45, 31,708.62 and 14,448.99

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Solution

The fourth proportional to 21,128.45, 31,708.62 and 14,448.99 is: 21,684.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.45 : 31,708.62 = 14,448.99 : x
  2. Step 2: Convert to fraction form
    21,128.45/31,708.62 = 14,448.99/x
  3. Step 3: Cross multiply
    21,128.45x = 31,708.62 × 14,448.99
  4. Step 4: Simplify right side
    21,128.45x = 458,157,533.29
  5. Step 5: Solve for x
    x = 458,157,533.29/21,128.45
  6. Step 6: Final answer
    x = 21,684.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.