Home / 13,155.62-18,154.92-7,187.34

Finding the Fourth Proportional to 13,155.62, 18,154.92 and 7,187.34

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Solution

The fourth proportional to 13,155.62, 18,154.92 and 7,187.34 is: 9,918.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.62 : 18,154.92 = 7,187.34 : x
  2. Step 2: Convert to fraction form
    13,155.62/18,154.92 = 7,187.34/x
  3. Step 3: Cross multiply
    13,155.62x = 18,154.92 × 7,187.34
  4. Step 4: Simplify right side
    13,155.62x = 130,485,582.71
  5. Step 5: Solve for x
    x = 130,485,582.71/13,155.62
  6. Step 6: Final answer
    x = 9,918.62

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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.