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Finding the Fourth Proportional to 28,433, 39,237.54 and 15,857.76

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Solution

The fourth proportional to 28,433, 39,237.54 and 15,857.76 is: 21,883.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,433 : 39,237.54 = 15,857.76 : x
  2. Step 2: Convert to fraction form
    28,433/39,237.54 = 15,857.76/x
  3. Step 3: Cross multiply
    28,433x = 39,237.54 × 15,857.76
  4. Step 4: Simplify right side
    28,433x = 622,219,492.31
  5. Step 5: Solve for x
    x = 622,219,492.31/28,433
  6. Step 6: Final answer
    x = 21,883.71

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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.