Home / 14,778.90-20,402.33-9,406.77

Finding the Fourth Proportional to 14,778.90, 20,402.33 and 9,406.77

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Solution

The fourth proportional to 14,778.90, 20,402.33 and 9,406.77 is: 12,986.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,778.90 : 20,402.33 = 9,406.77 : x
  2. Step 2: Convert to fraction form
    14,778.90/20,402.33 = 9,406.77/x
  3. Step 3: Cross multiply
    14,778.90x = 20,402.33 × 9,406.77
  4. Step 4: Simplify right side
    14,778.90x = 191,919,978.74
  5. Step 5: Solve for x
    x = 191,919,978.74/14,778.90
  6. Step 6: Final answer
    x = 12,986.08

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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.