Home / 21,535.57-29,706.69-13,455.21

Finding the Fourth Proportional to 21,535.57, 29,706.69 and 13,455.21

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Solution

The fourth proportional to 21,535.57, 29,706.69 and 13,455.21 is: 18,560.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,535.57 : 29,706.69 = 13,455.21 : x
  2. Step 2: Convert to fraction form
    21,535.57/29,706.69 = 13,455.21/x
  3. Step 3: Cross multiply
    21,535.57x = 29,706.69 × 13,455.21
  4. Step 4: Simplify right side
    21,535.57x = 399,709,752.35
  5. Step 5: Solve for x
    x = 399,709,752.35/21,535.57
  6. Step 6: Final answer
    x = 18,560.44

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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.