Home / 10,690.80-16,036.20-8,487.60

Finding the Fourth Proportional to 10,690.80, 16,036.20 and 8,487.60

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Solution

The fourth proportional to 10,690.80, 16,036.20 and 8,487.60 is: 12,731.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,690.80 : 16,036.20 = 8,487.60 : x
  2. Step 2: Convert to fraction form
    10,690.80/16,036.20 = 8,487.60/x
  3. Step 3: Cross multiply
    10,690.80x = 16,036.20 × 8,487.60
  4. Step 4: Simplify right side
    10,690.80x = 136,108,851.12
  5. Step 5: Solve for x
    x = 136,108,851.12/10,690.80
  6. Step 6: Final answer
    x = 12,731.40

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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.