Home / 21,085.93-31,563.28-13,278.34

Finding the Fourth Proportional to 21,085.93, 31,563.28 and 13,278.34

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Solution

The fourth proportional to 21,085.93, 31,563.28 and 13,278.34 is: 19,876.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.93 : 31,563.28 = 13,278.34 : x
  2. Step 2: Convert to fraction form
    21,085.93/31,563.28 = 13,278.34/x
  3. Step 3: Cross multiply
    21,085.93x = 31,563.28 × 13,278.34
  4. Step 4: Simplify right side
    21,085.93x = 419,107,963.36
  5. Step 5: Solve for x
    x = 419,107,963.36/21,085.93
  6. Step 6: Final answer
    x = 19,876.19

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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.