Home / 10,421.95-14,383.72-6,391.19

Finding the Fourth Proportional to 10,421.95, 14,383.72 and 6,391.19

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Solution

The fourth proportional to 10,421.95, 14,383.72 and 6,391.19 is: 8,820.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.95 : 14,383.72 = 6,391.19 : x
  2. Step 2: Convert to fraction form
    10,421.95/14,383.72 = 6,391.19/x
  3. Step 3: Cross multiply
    10,421.95x = 14,383.72 × 6,391.19
  4. Step 4: Simplify right side
    10,421.95x = 91,929,023.50
  5. Step 5: Solve for x
    x = 91,929,023.50/10,421.95
  6. Step 6: Final answer
    x = 8,820.71

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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.