Home / 13,155.78-18,154.29-7,187.37

Finding the Fourth Proportional to 13,155.78, 18,154.29 and 7,187.37

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Solution

The fourth proportional to 13,155.78, 18,154.29 and 7,187.37 is: 9,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.78 : 18,154.29 = 7,187.37 : x
  2. Step 2: Convert to fraction form
    13,155.78/18,154.29 = 7,187.37/x
  3. Step 3: Cross multiply
    13,155.78x = 18,154.29 × 7,187.37
  4. Step 4: Simplify right side
    13,155.78x = 130,481,599.32
  5. Step 5: Solve for x
    x = 130,481,599.32/13,155.78
  6. Step 6: Final answer
    x = 9,918.20

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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.