Home / 13,777.21-19,011.27-7,809.40

Finding the Fourth Proportional to 13,777.21, 19,011.27 and 7,809.40

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Solution

The fourth proportional to 13,777.21, 19,011.27 and 7,809.40 is: 10,776.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,777.21 : 19,011.27 = 7,809.40 : x
  2. Step 2: Convert to fraction form
    13,777.21/19,011.27 = 7,809.40/x
  3. Step 3: Cross multiply
    13,777.21x = 19,011.27 × 7,809.40
  4. Step 4: Simplify right side
    13,777.21x = 148,466,611.94
  5. Step 5: Solve for x
    x = 148,466,611.94/13,777.21
  6. Step 6: Final answer
    x = 10,776.25

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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.