Home / 13,875.21-19,153.49-9,405.09

Finding the Fourth Proportional to 13,875.21, 19,153.49 and 9,405.09

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Solution

The fourth proportional to 13,875.21, 19,153.49 and 9,405.09 is: 12,982.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,875.21 : 19,153.49 = 9,405.09 : x
  2. Step 2: Convert to fraction form
    13,875.21/19,153.49 = 9,405.09/x
  3. Step 3: Cross multiply
    13,875.21x = 19,153.49 × 9,405.09
  4. Step 4: Simplify right side
    13,875.21x = 180,140,250.24
  5. Step 5: Solve for x
    x = 180,140,250.24/13,875.21
  6. Step 6: Final answer
    x = 12,982.88

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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.