Home / 15,399.09-21,250.76-8,325.51

Finding the Fourth Proportional to 15,399.09, 21,250.76 and 8,325.51

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Solution

The fourth proportional to 15,399.09, 21,250.76 and 8,325.51 is: 11,489.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.09 : 21,250.76 = 8,325.51 : x
  2. Step 2: Convert to fraction form
    15,399.09/21,250.76 = 8,325.51/x
  3. Step 3: Cross multiply
    15,399.09x = 21,250.76 × 8,325.51
  4. Step 4: Simplify right side
    15,399.09x = 176,923,373.26
  5. Step 5: Solve for x
    x = 176,923,373.26/15,399.09
  6. Step 6: Final answer
    x = 11,489.21

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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.