Home / 10,420.28-14,379.41-5,703.65

Finding the Fourth Proportional to 10,420.28, 14,379.41 and 5,703.65

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Solution

The fourth proportional to 10,420.28, 14,379.41 and 5,703.65 is: 7,870.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.28 : 14,379.41 = 5,703.65 : x
  2. Step 2: Convert to fraction form
    10,420.28/14,379.41 = 5,703.65/x
  3. Step 3: Cross multiply
    10,420.28x = 14,379.41 × 5,703.65
  4. Step 4: Simplify right side
    10,420.28x = 82,015,021.43
  5. Step 5: Solve for x
    x = 82,015,021.43/10,420.28
  6. Step 6: Final answer
    x = 7,870.72

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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.