Home / 13,320.56-18,390.04-8,850.40

Finding the Fourth Proportional to 13,320.56, 18,390.04 and 8,850.40

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Solution

The fourth proportional to 13,320.56, 18,390.04 and 8,850.40 is: 12,218.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.56 : 18,390.04 = 8,850.40 : x
  2. Step 2: Convert to fraction form
    13,320.56/18,390.04 = 8,850.40/x
  3. Step 3: Cross multiply
    13,320.56x = 18,390.04 × 8,850.40
  4. Step 4: Simplify right side
    13,320.56x = 162,759,210.02
  5. Step 5: Solve for x
    x = 162,759,210.02/13,320.56
  6. Step 6: Final answer
    x = 12,218.65

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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.