Home / 13,140.86-18,134.33-7,172.51

Finding the Fourth Proportional to 13,140.86, 18,134.33 and 7,172.51

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Solution

The fourth proportional to 13,140.86, 18,134.33 and 7,172.51 is: 9,898.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.86 : 18,134.33 = 7,172.51 : x
  2. Step 2: Convert to fraction form
    13,140.86/18,134.33 = 7,172.51/x
  3. Step 3: Cross multiply
    13,140.86x = 18,134.33 × 7,172.51
  4. Step 4: Simplify right side
    13,140.86x = 130,068,536.73
  5. Step 5: Solve for x
    x = 130,068,536.73/13,140.86
  6. Step 6: Final answer
    x = 9,898.03

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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.