Home / 11,153.30-15,391.01-6,439.10

Finding the Fourth Proportional to 11,153.30, 15,391.01 and 6,439.10

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Solution

The fourth proportional to 11,153.30, 15,391.01 and 6,439.10 is: 8,885.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,153.30 : 15,391.01 = 6,439.10 : x
  2. Step 2: Convert to fraction form
    11,153.30/15,391.01 = 6,439.10/x
  3. Step 3: Cross multiply
    11,153.30x = 15,391.01 × 6,439.10
  4. Step 4: Simplify right side
    11,153.30x = 99,104,191.63
  5. Step 5: Solve for x
    x = 99,104,191.63/11,153.30
  6. Step 6: Final answer
    x = 8,885.64

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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.