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Finding the Fourth Proportional to 28,136.25, 38,828.03 and 15,562.89

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Solution

The fourth proportional to 28,136.25, 38,828.03 and 15,562.89 is: 21,476.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,136.25 : 38,828.03 = 15,562.89 : x
  2. Step 2: Convert to fraction form
    28,136.25/38,828.03 = 15,562.89/x
  3. Step 3: Cross multiply
    28,136.25x = 38,828.03 × 15,562.89
  4. Step 4: Simplify right side
    28,136.25x = 604,276,281.99
  5. Step 5: Solve for x
    x = 604,276,281.99/28,136.25
  6. Step 6: Final answer
    x = 21,476.79

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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.