Home / 13,787.90-19,028.04-7,821.49

Finding the Fourth Proportional to 13,787.90, 19,028.04 and 7,821.49

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Solution

The fourth proportional to 13,787.90, 19,028.04 and 7,821.49 is: 10,794.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.90 : 19,028.04 = 7,821.49 : x
  2. Step 2: Convert to fraction form
    13,787.90/19,028.04 = 7,821.49/x
  3. Step 3: Cross multiply
    13,787.90x = 19,028.04 × 7,821.49
  4. Step 4: Simplify right side
    13,787.90x = 148,827,551.84
  5. Step 5: Solve for x
    x = 148,827,551.84/13,787.90
  6. Step 6: Final answer
    x = 10,794.07

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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.