Home / 13,154.40-18,153.36-7,186.32

Finding the Fourth Proportional to 13,154.40, 18,153.36 and 7,186.32

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Solution

The fourth proportional to 13,154.40, 18,153.36 and 7,186.32 is: 9,917.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,154.40 : 18,153.36 = 7,186.32 : x
  2. Step 2: Convert to fraction form
    13,154.40/18,153.36 = 7,186.32/x
  3. Step 3: Cross multiply
    13,154.40x = 18,153.36 × 7,186.32
  4. Step 4: Simplify right side
    13,154.40x = 130,455,854.04
  5. Step 5: Solve for x
    x = 130,455,854.04/13,154.40
  6. Step 6: Final answer
    x = 9,917.28

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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.