Home / 21,787.28-30,072.84-13,835.60

Finding the Fourth Proportional to 21,787.28, 30,072.84 and 13,835.60

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Solution

The fourth proportional to 21,787.28, 30,072.84 and 13,835.60 is: 19,097.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.28 : 30,072.84 = 13,835.60 : x
  2. Step 2: Convert to fraction form
    21,787.28/30,072.84 = 13,835.60/x
  3. Step 3: Cross multiply
    21,787.28x = 30,072.84 × 13,835.60
  4. Step 4: Simplify right side
    21,787.28x = 416,075,785.10
  5. Step 5: Solve for x
    x = 416,075,785.10/21,787.28
  6. Step 6: Final answer
    x = 19,097.19

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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.