Home / 21,388.56-31,869.66-19,060.80

Finding the Fourth Proportional to 21,388.56, 31,869.66 and 19,060.80

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Solution

The fourth proportional to 21,388.56, 31,869.66 and 19,060.80 is: 28,401.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.56 : 31,869.66 = 19,060.80 : x
  2. Step 2: Convert to fraction form
    21,388.56/31,869.66 = 19,060.80/x
  3. Step 3: Cross multiply
    21,388.56x = 31,869.66 × 19,060.80
  4. Step 4: Simplify right side
    21,388.56x = 607,461,215.33
  5. Step 5: Solve for x
    x = 607,461,215.33/21,388.56
  6. Step 6: Final answer
    x = 28,401.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.