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Finding the Fourth Proportional to 18,338.95, 25,307.76 and 9,955.45

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Solution

The fourth proportional to 18,338.95, 25,307.76 and 9,955.45 is: 13,738.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,338.95 : 25,307.76 = 9,955.45 : x
  2. Step 2: Convert to fraction form
    18,338.95/25,307.76 = 9,955.45/x
  3. Step 3: Cross multiply
    18,338.95x = 25,307.76 × 9,955.45
  4. Step 4: Simplify right side
    18,338.95x = 251,950,113.36
  5. Step 5: Solve for x
    x = 251,950,113.36/18,338.95
  6. Step 6: Final answer
    x = 13,738.53

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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.