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Finding the Fourth Proportional to 14,005.60, 21,008.40 and 9,080.80

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Solution

The fourth proportional to 14,005.60, 21,008.40 and 9,080.80 is: 13,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,005.60 : 21,008.40 = 9,080.80 : x
  2. Step 2: Convert to fraction form
    14,005.60/21,008.40 = 9,080.80/x
  3. Step 3: Cross multiply
    14,005.60x = 21,008.40 × 9,080.80
  4. Step 4: Simplify right side
    14,005.60x = 190,773,078.72
  5. Step 5: Solve for x
    x = 190,773,078.72/14,005.60
  6. Step 6: Final answer
    x = 13,621.20

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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.