Home / 13,156.05-18,155.04-7,187.74

Finding the Fourth Proportional to 13,156.05, 18,155.04 and 7,187.74

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Solution

The fourth proportional to 13,156.05, 18,155.04 and 7,187.74 is: 9,918.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.05 : 18,155.04 = 7,187.74 : x
  2. Step 2: Convert to fraction form
    13,156.05/18,155.04 = 7,187.74/x
  3. Step 3: Cross multiply
    13,156.05x = 18,155.04 × 7,187.74
  4. Step 4: Simplify right side
    13,156.05x = 130,493,707.21
  5. Step 5: Solve for x
    x = 130,493,707.21/13,156.05
  6. Step 6: Final answer
    x = 9,918.91

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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.