Home / 20,087.20-27,715.53-14,420.98

Finding the Fourth Proportional to 20,087.20, 27,715.53 and 14,420.98

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Solution

The fourth proportional to 20,087.20, 27,715.53 and 14,420.98 is: 19,897.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.20 : 27,715.53 = 14,420.98 : x
  2. Step 2: Convert to fraction form
    20,087.20/27,715.53 = 14,420.98/x
  3. Step 3: Cross multiply
    20,087.20x = 27,715.53 × 14,420.98
  4. Step 4: Simplify right side
    20,087.20x = 399,685,103.82
  5. Step 5: Solve for x
    x = 399,685,103.82/20,087.20
  6. Step 6: Final answer
    x = 19,897.50

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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.