Home / 15,776.90-21,771.14-9,057.81

Finding the Fourth Proportional to 15,776.90, 21,771.14 and 9,057.81

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Solution

The fourth proportional to 15,776.90, 21,771.14 and 9,057.81 is: 12,499.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,776.90 : 21,771.14 = 9,057.81 : x
  2. Step 2: Convert to fraction form
    15,776.90/21,771.14 = 9,057.81/x
  3. Step 3: Cross multiply
    15,776.90x = 21,771.14 × 9,057.81
  4. Step 4: Simplify right side
    15,776.90x = 197,198,849.60
  5. Step 5: Solve for x
    x = 197,198,849.60/15,776.90
  6. Step 6: Final answer
    x = 12,499.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.