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Finding the Fourth Proportional to 28,041.60, 42,004.80 and 14,198.40

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Solution

The fourth proportional to 28,041.60, 42,004.80 and 14,198.40 is: 21,268.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,041.60 : 42,004.80 = 14,198.40 : x
  2. Step 2: Convert to fraction form
    28,041.60/42,004.80 = 14,198.40/x
  3. Step 3: Cross multiply
    28,041.60x = 42,004.80 × 14,198.40
  4. Step 4: Simplify right side
    28,041.60x = 596,400,952.32
  5. Step 5: Solve for x
    x = 596,400,952.32/28,041.60
  6. Step 6: Final answer
    x = 21,268.44

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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.