Home / 13,157.18-18,156.58-7,188.88

Finding the Fourth Proportional to 13,157.18, 18,156.58 and 7,188.88

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Solution

The fourth proportional to 13,157.18, 18,156.58 and 7,188.88 is: 9,920.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,157.18 : 18,156.58 = 7,188.88 : x
  2. Step 2: Convert to fraction form
    13,157.18/18,156.58 = 7,188.88/x
  3. Step 3: Cross multiply
    13,157.18x = 18,156.58 × 7,188.88
  4. Step 4: Simplify right side
    13,157.18x = 130,525,474.83
  5. Step 5: Solve for x
    x = 130,525,474.83/13,157.18
  6. Step 6: Final answer
    x = 9,920.47

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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.