Home / 20,999.64-28,970.13-14,191.50

Finding the Fourth Proportional to 20,999.64, 28,970.13 and 14,191.50

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Solution

The fourth proportional to 20,999.64, 28,970.13 and 14,191.50 is: 19,577.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.64 : 28,970.13 = 14,191.50 : x
  2. Step 2: Convert to fraction form
    20,999.64/28,970.13 = 14,191.50/x
  3. Step 3: Cross multiply
    20,999.64x = 28,970.13 × 14,191.50
  4. Step 4: Simplify right side
    20,999.64x = 411,129,599.90
  5. Step 5: Solve for x
    x = 411,129,599.90/20,999.64
  6. Step 6: Final answer
    x = 19,577.94

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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.