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Finding the Fourth Proportional to 17,985.20, 26,977.80 and 10,079.60

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Solution

The fourth proportional to 17,985.20, 26,977.80 and 10,079.60 is: 15,119.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,985.20 : 26,977.80 = 10,079.60 : x
  2. Step 2: Convert to fraction form
    17,985.20/26,977.80 = 10,079.60/x
  3. Step 3: Cross multiply
    17,985.20x = 26,977.80 × 10,079.60
  4. Step 4: Simplify right side
    17,985.20x = 271,925,432.88
  5. Step 5: Solve for x
    x = 271,925,432.88/17,985.20
  6. Step 6: Final answer
    x = 15,119.40

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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.