Home / 15,402.40-21,255.34-8,328.84

Finding the Fourth Proportional to 15,402.40, 21,255.34 and 8,328.84

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Solution

The fourth proportional to 15,402.40, 21,255.34 and 8,328.84 is: 11,493.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,402.40 : 21,255.34 = 8,328.84 : x
  2. Step 2: Convert to fraction form
    15,402.40/21,255.34 = 8,328.84/x
  3. Step 3: Cross multiply
    15,402.40x = 21,255.34 × 8,328.84
  4. Step 4: Simplify right side
    15,402.40x = 177,032,326.01
  5. Step 5: Solve for x
    x = 177,032,326.01/15,402.40
  6. Step 6: Final answer
    x = 11,493.81

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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.