Home / 15,391.71-21,240.32-8,677.35

Finding the Fourth Proportional to 15,391.71, 21,240.32 and 8,677.35

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Solution

The fourth proportional to 15,391.71, 21,240.32 and 8,677.35 is: 11,974.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.71 : 21,240.32 = 8,677.35 : x
  2. Step 2: Convert to fraction form
    15,391.71/21,240.32 = 8,677.35/x
  3. Step 3: Cross multiply
    15,391.71x = 21,240.32 × 8,677.35
  4. Step 4: Simplify right side
    15,391.71x = 184,309,647.37
  5. Step 5: Solve for x
    x = 184,309,647.37/15,391.71
  6. Step 6: Final answer
    x = 11,974.60

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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.