Home / 10,389.30-15,581.07-2,991.75

Finding the Fourth Proportional to 10,389.30, 15,581.07 and 2,991.75

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Solution

The fourth proportional to 10,389.30, 15,581.07 and 2,991.75 is: 4,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,389.30 : 15,581.07 = 2,991.75 : x
  2. Step 2: Convert to fraction form
    10,389.30/15,581.07 = 2,991.75/x
  3. Step 3: Cross multiply
    10,389.30x = 15,581.07 × 2,991.75
  4. Step 4: Simplify right side
    10,389.30x = 46,614,666.17
  5. Step 5: Solve for x
    x = 46,614,666.17/10,389.30
  6. Step 6: Final answer
    x = 4,486.80

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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.