Home / 9,981.90-13,779.45-6,446.84

Finding the Fourth Proportional to 9,981.90, 13,779.45 and 6,446.84

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Solution

The fourth proportional to 9,981.90, 13,779.45 and 6,446.84 is: 8,899.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,981.90 : 13,779.45 = 6,446.84 : x
  2. Step 2: Convert to fraction form
    9,981.90/13,779.45 = 6,446.84/x
  3. Step 3: Cross multiply
    9,981.90x = 13,779.45 × 6,446.84
  4. Step 4: Simplify right side
    9,981.90x = 88,833,840.54
  5. Step 5: Solve for x
    x = 88,833,840.54/9,981.90
  6. Step 6: Final answer
    x = 8,899.49

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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.