Home / 10,931.25-16,399.65-3,140.07

Finding the Fourth Proportional to 10,931.25, 16,399.65 and 3,140.07

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Solution

The fourth proportional to 10,931.25, 16,399.65 and 3,140.07 is: 4,710.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.25 : 16,399.65 = 3,140.07 : x
  2. Step 2: Convert to fraction form
    10,931.25/16,399.65 = 3,140.07/x
  3. Step 3: Cross multiply
    10,931.25x = 16,399.65 × 3,140.07
  4. Step 4: Simplify right side
    10,931.25x = 51,496,048.98
  5. Step 5: Solve for x
    x = 51,496,048.98/10,931.25
  6. Step 6: Final answer
    x = 4,710.90

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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.