Home / 13,153.78-18,153.47-7,186.35

Finding the Fourth Proportional to 13,153.78, 18,153.47 and 7,186.35

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Solution

The fourth proportional to 13,153.78, 18,153.47 and 7,186.35 is: 9,917.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,153.78 : 18,153.47 = 7,186.35 : x
  2. Step 2: Convert to fraction form
    13,153.78/18,153.47 = 7,186.35/x
  3. Step 3: Cross multiply
    13,153.78x = 18,153.47 × 7,186.35
  4. Step 4: Simplify right side
    13,153.78x = 130,457,081.58
  5. Step 5: Solve for x
    x = 130,457,081.58/13,153.78
  6. Step 6: Final answer
    x = 9,917.84

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Double scale
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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.