Home / 13,178.16-18,187.38-7,357.86

Finding the Fourth Proportional to 13,178.16, 18,187.38 and 7,357.86

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Solution

The fourth proportional to 13,178.16, 18,187.38 and 7,357.86 is: 10,154.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.16 : 18,187.38 = 7,357.86 : x
  2. Step 2: Convert to fraction form
    13,178.16/18,187.38 = 7,357.86/x
  3. Step 3: Cross multiply
    13,178.16x = 18,187.38 × 7,357.86
  4. Step 4: Simplify right side
    13,178.16x = 133,820,195.81
  5. Step 5: Solve for x
    x = 133,820,195.81/13,178.16
  6. Step 6: Final answer
    x = 10,154.70

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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.