Home / 13,281.20-19,929.99-5,490

Finding the Fourth Proportional to 13,281.20, 19,929.99 and 5,490

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Solution

The fourth proportional to 13,281.20, 19,929.99 and 5,490 is: 8,238.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.20 : 19,929.99 = 5,490 : x
  2. Step 2: Convert to fraction form
    13,281.20/19,929.99 = 5,490/x
  3. Step 3: Cross multiply
    13,281.20x = 19,929.99 × 5,490
  4. Step 4: Simplify right side
    13,281.20x = 109,415,645.10
  5. Step 5: Solve for x
    x = 109,415,645.10/13,281.20
  6. Step 6: Final answer
    x = 8,238.39

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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.