Home / 18,321.90-25,307.95-13,551.54

Finding the Fourth Proportional to 18,321.90, 25,307.95 and 13,551.54

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Solution

The fourth proportional to 18,321.90, 25,307.95 and 13,551.54 is: 18,718.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321.90 : 25,307.95 = 13,551.54 : x
  2. Step 2: Convert to fraction form
    18,321.90/25,307.95 = 13,551.54/x
  3. Step 3: Cross multiply
    18,321.90x = 25,307.95 × 13,551.54
  4. Step 4: Simplify right side
    18,321.90x = 342,961,696.74
  5. Step 5: Solve for x
    x = 342,961,696.74/18,321.90
  6. Step 6: Final answer
    x = 18,718.68

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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.