Home / 15,322.63-21,131.18-9,939.46

Finding the Fourth Proportional to 15,322.63, 21,131.18 and 9,939.46

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Solution

The fourth proportional to 15,322.63, 21,131.18 and 9,939.46 is: 13,707.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,322.63 : 21,131.18 = 9,939.46 : x
  2. Step 2: Convert to fraction form
    15,322.63/21,131.18 = 9,939.46/x
  3. Step 3: Cross multiply
    15,322.63x = 21,131.18 × 9,939.46
  4. Step 4: Simplify right side
    15,322.63x = 210,032,437.56
  5. Step 5: Solve for x
    x = 210,032,437.56/15,322.63
  6. Step 6: Final answer
    x = 13,707.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.