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Finding the Fourth Proportional to 28,099, 38,773.20 and 15,523.84

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Solution

The fourth proportional to 28,099, 38,773.20 and 15,523.84 is: 21,421.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,099 : 38,773.20 = 15,523.84 : x
  2. Step 2: Convert to fraction form
    28,099/38,773.20 = 15,523.84/x
  3. Step 3: Cross multiply
    28,099x = 38,773.20 × 15,523.84
  4. Step 4: Simplify right side
    28,099x = 601,908,953.09
  5. Step 5: Solve for x
    x = 601,908,953.09/28,099
  6. Step 6: Final answer
    x = 21,421.01

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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.