Home / 13,101.81-18,080.70-7,133.58

Finding the Fourth Proportional to 13,101.81, 18,080.70 and 7,133.58

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Solution

The fourth proportional to 13,101.81, 18,080.70 and 7,133.58 is: 9,844.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.81 : 18,080.70 = 7,133.58 : x
  2. Step 2: Convert to fraction form
    13,101.81/18,080.70 = 7,133.58/x
  3. Step 3: Cross multiply
    13,101.81x = 18,080.70 × 7,133.58
  4. Step 4: Simplify right side
    13,101.81x = 128,980,119.91
  5. Step 5: Solve for x
    x = 128,980,119.91/13,101.81
  6. Step 6: Final answer
    x = 9,844.45

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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.