Home / 18,966.95-28,429.21-7,109.31

Finding the Fourth Proportional to 18,966.95, 28,429.21 and 7,109.31

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Solution

The fourth proportional to 18,966.95, 28,429.21 and 7,109.31 is: 10,656.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,966.95 : 28,429.21 = 7,109.31 : x
  2. Step 2: Convert to fraction form
    18,966.95/28,429.21 = 7,109.31/x
  3. Step 3: Cross multiply
    18,966.95x = 28,429.21 × 7,109.31
  4. Step 4: Simplify right side
    18,966.95x = 202,112,066.95
  5. Step 5: Solve for x
    x = 202,112,066.95/18,966.95
  6. Step 6: Final answer
    x = 10,656.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.