Home / 11,390.89-15,719.45-6,354.98

Finding the Fourth Proportional to 11,390.89, 15,719.45 and 6,354.98

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Solution

The fourth proportional to 11,390.89, 15,719.45 and 6,354.98 is: 8,769.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,390.89 : 15,719.45 = 6,354.98 : x
  2. Step 2: Convert to fraction form
    11,390.89/15,719.45 = 6,354.98/x
  3. Step 3: Cross multiply
    11,390.89x = 15,719.45 × 6,354.98
  4. Step 4: Simplify right side
    11,390.89x = 99,896,758.59
  5. Step 5: Solve for x
    x = 99,896,758.59/11,390.89
  6. Step 6: Final answer
    x = 8,769.89

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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.