Home / 21,330.09-31,929.52-13,918.59

Finding the Fourth Proportional to 21,330.09, 31,929.52 and 13,918.59

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Solution

The fourth proportional to 21,330.09, 31,929.52 and 13,918.59 is: 20,835.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.09 : 31,929.52 = 13,918.59 : x
  2. Step 2: Convert to fraction form
    21,330.09/31,929.52 = 13,918.59/x
  3. Step 3: Cross multiply
    21,330.09x = 31,929.52 × 13,918.59
  4. Step 4: Simplify right side
    21,330.09x = 444,413,897.78
  5. Step 5: Solve for x
    x = 444,413,897.78/21,330.09
  6. Step 6: Final answer
    x = 20,835.07

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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.