Home / 13,777.32-19,013.08-7,808.78

Finding the Fourth Proportional to 13,777.32, 19,013.08 and 7,808.78

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Solution

The fourth proportional to 13,777.32, 19,013.08 and 7,808.78 is: 10,776.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,777.32 : 19,013.08 = 7,808.78 : x
  2. Step 2: Convert to fraction form
    13,777.32/19,013.08 = 7,808.78/x
  3. Step 3: Cross multiply
    13,777.32x = 19,013.08 × 7,808.78
  4. Step 4: Simplify right side
    13,777.32x = 148,468,958.84
  5. Step 5: Solve for x
    x = 148,468,958.84/13,777.32
  6. Step 6: Final answer
    x = 10,776.33

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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.