Home / 10,421.68-14,382.12-5,705.86

Finding the Fourth Proportional to 10,421.68, 14,382.12 and 5,705.86

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Solution

The fourth proportional to 10,421.68, 14,382.12 and 5,705.86 is: 7,874.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.68 : 14,382.12 = 5,705.86 : x
  2. Step 2: Convert to fraction form
    10,421.68/14,382.12 = 5,705.86/x
  3. Step 3: Cross multiply
    10,421.68x = 14,382.12 × 5,705.86
  4. Step 4: Simplify right side
    10,421.68x = 82,062,363.22
  5. Step 5: Solve for x
    x = 82,062,363.22/10,421.68
  6. Step 6: Final answer
    x = 7,874.20

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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.