Home / 13,278.21-18,323.88-7,309.89

Finding the Fourth Proportional to 13,278.21, 18,323.88 and 7,309.89

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Solution

The fourth proportional to 13,278.21, 18,323.88 and 7,309.89 is: 10,087.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.21 : 18,323.88 = 7,309.89 : x
  2. Step 2: Convert to fraction form
    13,278.21/18,323.88 = 7,309.89/x
  3. Step 3: Cross multiply
    13,278.21x = 18,323.88 × 7,309.89
  4. Step 4: Simplify right side
    13,278.21x = 133,945,547.17
  5. Step 5: Solve for x
    x = 133,945,547.17/13,278.21
  6. Step 6: Final answer
    x = 10,087.62

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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.