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Finding the Fourth Proportional to 21,997.60, 32,980.20 and 9,507.40

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Solution

The fourth proportional to 21,997.60, 32,980.20 and 9,507.40 is: 14,254.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,997.60 : 32,980.20 = 9,507.40 : x
  2. Step 2: Convert to fraction form
    21,997.60/32,980.20 = 9,507.40/x
  3. Step 3: Cross multiply
    21,997.60x = 32,980.20 × 9,507.40
  4. Step 4: Simplify right side
    21,997.60x = 313,555,953.48
  5. Step 5: Solve for x
    x = 313,555,953.48/21,997.60
  6. Step 6: Final answer
    x = 14,254.10

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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.