Home / 10,389.89-15,581.46-3,368.40

Finding the Fourth Proportional to 10,389.89, 15,581.46 and 3,368.40

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Solution

The fourth proportional to 10,389.89, 15,581.46 and 3,368.40 is: 5,051.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,389.89 : 15,581.46 = 3,368.40 : x
  2. Step 2: Convert to fraction form
    10,389.89/15,581.46 = 3,368.40/x
  3. Step 3: Cross multiply
    10,389.89x = 15,581.46 × 3,368.40
  4. Step 4: Simplify right side
    10,389.89x = 52,484,589.86
  5. Step 5: Solve for x
    x = 52,484,589.86/10,389.89
  6. Step 6: Final answer
    x = 5,051.51

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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.