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Finding the Fourth Proportional to 28,114.98, 38,799.05 and 15,368.42

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Solution

The fourth proportional to 28,114.98, 38,799.05 and 15,368.42 is: 21,208.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,114.98 : 38,799.05 = 15,368.42 : x
  2. Step 2: Convert to fraction form
    28,114.98/38,799.05 = 15,368.42/x
  3. Step 3: Cross multiply
    28,114.98x = 38,799.05 × 15,368.42
  4. Step 4: Simplify right side
    28,114.98x = 596,279,825.16
  5. Step 5: Solve for x
    x = 596,279,825.16/28,114.98
  6. Step 6: Final answer
    x = 21,208.62

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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.