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Finding the Fourth Proportional to 18,842.28, 28,237.02 and 14,159.30

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Solution

The fourth proportional to 18,842.28, 28,237.02 and 14,159.30 is: 21,219.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,842.28 : 28,237.02 = 14,159.30 : x
  2. Step 2: Convert to fraction form
    18,842.28/28,237.02 = 14,159.30/x
  3. Step 3: Cross multiply
    18,842.28x = 28,237.02 × 14,159.30
  4. Step 4: Simplify right side
    18,842.28x = 399,816,455.09
  5. Step 5: Solve for x
    x = 399,816,455.09/18,842.28
  6. Step 6: Final answer
    x = 21,219.11

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1.5x scale

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.