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Finding the Fourth Proportional to 13,482.40, 20,218.80 and 6,090.40

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Solution

The fourth proportional to 13,482.40, 20,218.80 and 6,090.40 is: 9,133.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,482.40 : 20,218.80 = 6,090.40 : x
  2. Step 2: Convert to fraction form
    13,482.40/20,218.80 = 6,090.40/x
  3. Step 3: Cross multiply
    13,482.40x = 20,218.80 × 6,090.40
  4. Step 4: Simplify right side
    13,482.40x = 123,140,579.52
  5. Step 5: Solve for x
    x = 123,140,579.52/13,482.40
  6. Step 6: Final answer
    x = 9,133.43

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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.