Home / 15,465.36-21,342.29-8,391.81

Finding the Fourth Proportional to 15,465.36, 21,342.29 and 8,391.81

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Solution

The fourth proportional to 15,465.36, 21,342.29 and 8,391.81 is: 11,580.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,465.36 : 21,342.29 = 8,391.81 : x
  2. Step 2: Convert to fraction form
    15,465.36/21,342.29 = 8,391.81/x
  3. Step 3: Cross multiply
    15,465.36x = 21,342.29 × 8,391.81
  4. Step 4: Simplify right side
    15,465.36x = 179,100,400.69
  5. Step 5: Solve for x
    x = 179,100,400.69/15,465.36
  6. Step 6: Final answer
    x = 11,580.75

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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.