Home / 13,391.52-18,480.74-8,085.28

Finding the Fourth Proportional to 13,391.52, 18,480.74 and 8,085.28

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Solution

The fourth proportional to 13,391.52, 18,480.74 and 8,085.28 is: 11,157.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.52 : 18,480.74 = 8,085.28 : x
  2. Step 2: Convert to fraction form
    13,391.52/18,480.74 = 8,085.28/x
  3. Step 3: Cross multiply
    13,391.52x = 18,480.74 × 8,085.28
  4. Step 4: Simplify right side
    13,391.52x = 149,421,957.51
  5. Step 5: Solve for x
    x = 149,421,957.51/13,391.52
  6. Step 6: Final answer
    x = 11,157.95

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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.