Home / 11,818.40-16,309.18-6,440.89

Finding the Fourth Proportional to 11,818.40, 16,309.18 and 6,440.89

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Solution

The fourth proportional to 11,818.40, 16,309.18 and 6,440.89 is: 8,888.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,818.40 : 16,309.18 = 6,440.89 : x
  2. Step 2: Convert to fraction form
    11,818.40/16,309.18 = 6,440.89/x
  3. Step 3: Cross multiply
    11,818.40x = 16,309.18 × 6,440.89
  4. Step 4: Simplify right side
    11,818.40x = 105,045,552.82
  5. Step 5: Solve for x
    x = 105,045,552.82/11,818.40
  6. Step 6: Final answer
    x = 8,888.31

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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.