Home / 15,185.62-20,955.12-8,812.40

Finding the Fourth Proportional to 15,185.62, 20,955.12 and 8,812.40

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Solution

The fourth proportional to 15,185.62, 20,955.12 and 8,812.40 is: 12,160.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,185.62 : 20,955.12 = 8,812.40 : x
  2. Step 2: Convert to fraction form
    15,185.62/20,955.12 = 8,812.40/x
  3. Step 3: Cross multiply
    15,185.62x = 20,955.12 × 8,812.40
  4. Step 4: Simplify right side
    15,185.62x = 184,664,899.49
  5. Step 5: Solve for x
    x = 184,664,899.49/15,185.62
  6. Step 6: Final answer
    x = 12,160.51

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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.