Home / 13,156.65-18,155.61-7,188.03

Finding the Fourth Proportional to 13,156.65, 18,155.61 and 7,188.03

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Solution

The fourth proportional to 13,156.65, 18,155.61 and 7,188.03 is: 9,919.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.65 : 18,155.61 = 7,188.03 : x
  2. Step 2: Convert to fraction form
    13,156.65/18,155.61 = 7,188.03/x
  3. Step 3: Cross multiply
    13,156.65x = 18,155.61 × 7,188.03
  4. Step 4: Simplify right side
    13,156.65x = 130,503,069.35
  5. Step 5: Solve for x
    x = 130,503,069.35/13,156.65
  6. Step 6: Final answer
    x = 9,919.17

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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.