Home / 21,511.84-29,617.68-18,355.36

Finding the Fourth Proportional to 21,511.84, 29,617.68 and 18,355.36

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Solution

The fourth proportional to 21,511.84, 29,617.68 and 18,355.36 is: 25,271.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.84 : 29,617.68 = 18,355.36 : x
  2. Step 2: Convert to fraction form
    21,511.84/29,617.68 = 18,355.36/x
  3. Step 3: Cross multiply
    21,511.84x = 29,617.68 × 18,355.36
  4. Step 4: Simplify right side
    21,511.84x = 543,643,178.76
  5. Step 5: Solve for x
    x = 543,643,178.76/21,511.84
  6. Step 6: Final answer
    x = 25,271.81

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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.