Home / 13,141.28-18,134.70-7,172.93

Finding the Fourth Proportional to 13,141.28, 18,134.70 and 7,172.93

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Solution

The fourth proportional to 13,141.28, 18,134.70 and 7,172.93 is: 9,898.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.28 : 18,134.70 = 7,172.93 : x
  2. Step 2: Convert to fraction form
    13,141.28/18,134.70 = 7,172.93/x
  3. Step 3: Cross multiply
    13,141.28x = 18,134.70 × 7,172.93
  4. Step 4: Simplify right side
    13,141.28x = 130,078,933.67
  5. Step 5: Solve for x
    x = 130,078,933.67/13,141.28
  6. Step 6: Final answer
    x = 9,898.50

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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.