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Finding the Fourth Proportional to 13,065.17, 18,030.20 and 7,958.93

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Solution

The fourth proportional to 13,065.17, 18,030.20 and 7,958.93 is: 10,983.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,065.17 : 18,030.20 = 7,958.93 : x
  2. Step 2: Convert to fraction form
    13,065.17/18,030.20 = 7,958.93/x
  3. Step 3: Cross multiply
    13,065.17x = 18,030.20 × 7,958.93
  4. Step 4: Simplify right side
    13,065.17x = 143,500,969.74
  5. Step 5: Solve for x
    x = 143,500,969.74/13,065.17
  6. Step 6: Final answer
    x = 10,983.48

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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.