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Finding the Fourth Proportional to 28,174.88, 38,881.60 and 15,599.90

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Solution

The fourth proportional to 28,174.88, 38,881.60 and 15,599.90 is: 21,528.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,174.88 : 38,881.60 = 15,599.90 : x
  2. Step 2: Convert to fraction form
    28,174.88/38,881.60 = 15,599.90/x
  3. Step 3: Cross multiply
    28,174.88x = 38,881.60 × 15,599.90
  4. Step 4: Simplify right side
    28,174.88x = 606,549,071.84
  5. Step 5: Solve for x
    x = 606,549,071.84/28,174.88
  6. Step 6: Final answer
    x = 21,528.01

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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.