Home / 13,777.30-19,012.47-7,808.86

Finding the Fourth Proportional to 13,777.30, 19,012.47 and 7,808.86

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Solution

The fourth proportional to 13,777.30, 19,012.47 and 7,808.86 is: 10,776.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,777.30 : 19,012.47 = 7,808.86 : x
  2. Step 2: Convert to fraction form
    13,777.30/19,012.47 = 7,808.86/x
  3. Step 3: Cross multiply
    13,777.30x = 19,012.47 × 7,808.86
  4. Step 4: Simplify right side
    13,777.30x = 148,465,716.48
  5. Step 5: Solve for x
    x = 148,465,716.48/13,777.30
  6. Step 6: Final answer
    x = 10,776.11

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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.