Home / 11,157.13-15,395.13-6,440.50

Finding the Fourth Proportional to 11,157.13, 15,395.13 and 6,440.50

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Solution

The fourth proportional to 11,157.13, 15,395.13 and 6,440.50 is: 8,886.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,157.13 : 15,395.13 = 6,440.50 : x
  2. Step 2: Convert to fraction form
    11,157.13/15,395.13 = 6,440.50/x
  3. Step 3: Cross multiply
    11,157.13x = 15,395.13 × 6,440.50
  4. Step 4: Simplify right side
    11,157.13x = 99,152,334.77
  5. Step 5: Solve for x
    x = 99,152,334.77/11,157.13
  6. Step 6: Final answer
    x = 8,886.90

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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.