Home / 13,291.97-18,338.81-7,911.95

Finding the Fourth Proportional to 13,291.97, 18,338.81 and 7,911.95

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Solution

The fourth proportional to 13,291.97, 18,338.81 and 7,911.95 is: 10,916.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.97 : 18,338.81 = 7,911.95 : x
  2. Step 2: Convert to fraction form
    13,291.97/18,338.81 = 7,911.95/x
  3. Step 3: Cross multiply
    13,291.97x = 18,338.81 × 7,911.95
  4. Step 4: Simplify right side
    13,291.97x = 145,095,616.53
  5. Step 5: Solve for x
    x = 145,095,616.53/13,291.97
  6. Step 6: Final answer
    x = 10,916.04

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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.