Home / 13,155.32-18,154.28-7,187.33

Finding the Fourth Proportional to 13,155.32, 18,154.28 and 7,187.33

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Solution

The fourth proportional to 13,155.32, 18,154.28 and 7,187.33 is: 9,918.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.32 : 18,154.28 = 7,187.33 : x
  2. Step 2: Convert to fraction form
    13,155.32/18,154.28 = 7,187.33/x
  3. Step 3: Cross multiply
    13,155.32x = 18,154.28 × 7,187.33
  4. Step 4: Simplify right side
    13,155.32x = 130,480,765.34
  5. Step 5: Solve for x
    x = 130,480,765.34/13,155.32
  6. Step 6: Final answer
    x = 9,918.48

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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.