Home / 15,322.79-21,131.42-9,939.60

Finding the Fourth Proportional to 15,322.79, 21,131.42 and 9,939.60

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Solution

The fourth proportional to 15,322.79, 21,131.42 and 9,939.60 is: 13,707.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,322.79 : 21,131.42 = 9,939.60 : x
  2. Step 2: Convert to fraction form
    15,322.79/21,131.42 = 9,939.60/x
  3. Step 3: Cross multiply
    15,322.79x = 21,131.42 × 9,939.60
  4. Step 4: Simplify right side
    15,322.79x = 210,037,812.53
  5. Step 5: Solve for x
    x = 210,037,812.53/15,322.79
  6. Step 6: Final answer
    x = 13,707.54

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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.