Home / 57,981.88-86,988.20-18,539.72

Finding the Fourth Proportional to 57,981.88, 86,988.20 and 18,539.72

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Solution

The fourth proportional to 57,981.88, 86,988.20 and 18,539.72 is: 27,814.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,981.88 : 86,988.20 = 18,539.72 : x
  2. Step 2: Convert to fraction form
    57,981.88/86,988.20 = 18,539.72/x
  3. Step 3: Cross multiply
    57,981.88x = 86,988.20 × 18,539.72
  4. Step 4: Simplify right side
    57,981.88x = 1,612,736,871.30
  5. Step 5: Solve for x
    x = 1,612,736,871.30/57,981.88
  6. Step 6: Final answer
    x = 27,814.50

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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.