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Finding the Fourth Proportional to 58,634.28, 87,955.16 and 20,678.86

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Solution

The fourth proportional to 58,634.28, 87,955.16 and 20,678.86 is: 31,019.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,634.28 : 87,955.16 = 20,678.86 : x
  2. Step 2: Convert to fraction form
    58,634.28/87,955.16 = 20,678.86/x
  3. Step 3: Cross multiply
    58,634.28x = 87,955.16 × 20,678.86
  4. Step 4: Simplify right side
    58,634.28x = 1,818,811,896.75
  5. Step 5: Solve for x
    x = 1,818,811,896.75/58,634.28
  6. Step 6: Final answer
    x = 31,019.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.