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Finding the Fourth Proportional to 28,157.63, 38,859.95 and 15,584.81

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Solution

The fourth proportional to 28,157.63, 38,859.95 and 15,584.81 is: 21,508.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.63 : 38,859.95 = 15,584.81 : x
  2. Step 2: Convert to fraction form
    28,157.63/38,859.95 = 15,584.81/x
  3. Step 3: Cross multiply
    28,157.63x = 38,859.95 × 15,584.81
  4. Step 4: Simplify right side
    28,157.63x = 605,624,782.02
  5. Step 5: Solve for x
    x = 605,624,782.02/28,157.63
  6. Step 6: Final answer
    x = 21,508.38

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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.