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Finding the Fourth Proportional to 19,201.20, 28,801.80 and 14,535.60

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Solution

The fourth proportional to 19,201.20, 28,801.80 and 14,535.60 is: 21,803.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,201.20 : 28,801.80 = 14,535.60 : x
  2. Step 2: Convert to fraction form
    19,201.20/28,801.80 = 14,535.60/x
  3. Step 3: Cross multiply
    19,201.20x = 28,801.80 × 14,535.60
  4. Step 4: Simplify right side
    19,201.20x = 418,651,444.08
  5. Step 5: Solve for x
    x = 418,651,444.08/19,201.20
  6. Step 6: Final answer
    x = 21,803.40

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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.