Home / 13,200.40-19,787.19-4,428.10

Finding the Fourth Proportional to 13,200.40, 19,787.19 and 4,428.10

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Solution

The fourth proportional to 13,200.40, 19,787.19 and 4,428.10 is: 6,637.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,200.40 : 19,787.19 = 4,428.10 : x
  2. Step 2: Convert to fraction form
    13,200.40/19,787.19 = 4,428.10/x
  3. Step 3: Cross multiply
    13,200.40x = 19,787.19 × 4,428.10
  4. Step 4: Simplify right side
    13,200.40x = 87,619,656.04
  5. Step 5: Solve for x
    x = 87,619,656.04/13,200.40
  6. Step 6: Final answer
    x = 6,637.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.