Home / 13,157.16-18,156.33-7,188.81

Finding the Fourth Proportional to 13,157.16, 18,156.33 and 7,188.81

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Solution

The fourth proportional to 13,157.16, 18,156.33 and 7,188.81 is: 9,920.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,157.16 : 18,156.33 = 7,188.81 : x
  2. Step 2: Convert to fraction form
    13,157.16/18,156.33 = 7,188.81/x
  3. Step 3: Cross multiply
    13,157.16x = 18,156.33 × 7,188.81
  4. Step 4: Simplify right side
    13,157.16x = 130,522,406.67
  5. Step 5: Solve for x
    x = 130,522,406.67/13,157.16
  6. Step 6: Final answer
    x = 9,920.26

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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.