Home / 11,443.18-15,779.12-9,937.80

Finding the Fourth Proportional to 11,443.18, 15,779.12 and 9,937.80

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Solution

The fourth proportional to 11,443.18, 15,779.12 and 9,937.80 is: 13,703.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,443.18 : 15,779.12 = 9,937.80 : x
  2. Step 2: Convert to fraction form
    11,443.18/15,779.12 = 9,937.80/x
  3. Step 3: Cross multiply
    11,443.18x = 15,779.12 × 9,937.80
  4. Step 4: Simplify right side
    11,443.18x = 156,809,738.74
  5. Step 5: Solve for x
    x = 156,809,738.74/11,443.18
  6. Step 6: Final answer
    x = 13,703.34

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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.