Home / 21,139.08-31,685.73-13,748.84

Finding the Fourth Proportional to 21,139.08, 31,685.73 and 13,748.84

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Solution

The fourth proportional to 21,139.08, 31,685.73 and 13,748.84 is: 20,608.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.08 : 31,685.73 = 13,748.84 : x
  2. Step 2: Convert to fraction form
    21,139.08/31,685.73 = 13,748.84/x
  3. Step 3: Cross multiply
    21,139.08x = 31,685.73 × 13,748.84
  4. Step 4: Simplify right side
    21,139.08x = 435,642,032.05
  5. Step 5: Solve for x
    x = 435,642,032.05/21,139.08
  6. Step 6: Final answer
    x = 20,608.37

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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.