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Finding the Fourth Proportional to 15,866.99, 21,852.03 and 15,522.59

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Solution

The fourth proportional to 15,866.99, 21,852.03 and 15,522.59 is: 21,377.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,866.99 : 21,852.03 = 15,522.59 : x
  2. Step 2: Convert to fraction form
    15,866.99/21,852.03 = 15,522.59/x
  3. Step 3: Cross multiply
    15,866.99x = 21,852.03 × 15,522.59
  4. Step 4: Simplify right side
    15,866.99x = 339,200,102.36
  5. Step 5: Solve for x
    x = 339,200,102.36/15,866.99
  6. Step 6: Final answer
    x = 21,377.72

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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.