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Finding the Fourth Proportional to 28,051.68, 38,713.50 and 15,478.68

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Solution

The fourth proportional to 28,051.68, 38,713.50 and 15,478.68 is: 21,361.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,051.68 : 38,713.50 = 15,478.68 : x
  2. Step 2: Convert to fraction form
    28,051.68/38,713.50 = 15,478.68/x
  3. Step 3: Cross multiply
    28,051.68x = 38,713.50 × 15,478.68
  4. Step 4: Simplify right side
    28,051.68x = 599,233,878.18
  5. Step 5: Solve for x
    x = 599,233,878.18/28,051.68
  6. Step 6: Final answer
    x = 21,361.78

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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.