Home / 13,510.87-18,642.79-12,422.16

Finding the Fourth Proportional to 13,510.87, 18,642.79 and 12,422.16

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Solution

The fourth proportional to 13,510.87, 18,642.79 and 12,422.16 is: 17,140.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,510.87 : 18,642.79 = 12,422.16 : x
  2. Step 2: Convert to fraction form
    13,510.87/18,642.79 = 12,422.16/x
  3. Step 3: Cross multiply
    13,510.87x = 18,642.79 × 12,422.16
  4. Step 4: Simplify right side
    13,510.87x = 231,583,735.75
  5. Step 5: Solve for x
    x = 231,583,735.75/13,510.87
  6. Step 6: Final answer
    x = 17,140.55

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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.