Home / 15,455.36-21,328.35-8,381.77

Finding the Fourth Proportional to 15,455.36, 21,328.35 and 8,381.77

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Solution

The fourth proportional to 15,455.36, 21,328.35 and 8,381.77 is: 11,566.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.36 : 21,328.35 = 8,381.77 : x
  2. Step 2: Convert to fraction form
    15,455.36/21,328.35 = 8,381.77/x
  3. Step 3: Cross multiply
    15,455.36x = 21,328.35 × 8,381.77
  4. Step 4: Simplify right side
    15,455.36x = 178,769,239.43
  5. Step 5: Solve for x
    x = 178,769,239.43/15,455.36
  6. Step 6: Final answer
    x = 11,566.81

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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.