Home / 21,090.76-31,636.10-8,616.64

Finding the Fourth Proportional to 21,090.76, 31,636.10 and 8,616.64

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Solution

The fourth proportional to 21,090.76, 31,636.10 and 8,616.64 is: 12,924.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.76 : 31,636.10 = 8,616.64 : x
  2. Step 2: Convert to fraction form
    21,090.76/31,636.10 = 8,616.64/x
  3. Step 3: Cross multiply
    21,090.76x = 31,636.10 × 8,616.64
  4. Step 4: Simplify right side
    21,090.76x = 272,596,884.70
  5. Step 5: Solve for x
    x = 272,596,884.70/21,090.76
  6. Step 6: Final answer
    x = 12,924.94

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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.