Home / 13,139.94-18,133.18-7,171.74

Finding the Fourth Proportional to 13,139.94, 18,133.18 and 7,171.74

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Solution

The fourth proportional to 13,139.94, 18,133.18 and 7,171.74 is: 9,897.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.94 : 18,133.18 = 7,171.74 : x
  2. Step 2: Convert to fraction form
    13,139.94/18,133.18 = 7,171.74/x
  3. Step 3: Cross multiply
    13,139.94x = 18,133.18 × 7,171.74
  4. Step 4: Simplify right side
    13,139.94x = 130,046,434.40
  5. Step 5: Solve for x
    x = 130,046,434.40/13,139.94
  6. Step 6: Final answer
    x = 9,897.03

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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.