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Finding the Fourth Proportional to 11,461.70, 15,818.22 and 6,985.85

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Solution

The fourth proportional to 11,461.70, 15,818.22 and 6,985.85 is: 9,641.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,461.70 : 15,818.22 = 6,985.85 : x
  2. Step 2: Convert to fraction form
    11,461.70/15,818.22 = 6,985.85/x
  3. Step 3: Cross multiply
    11,461.70x = 15,818.22 × 6,985.85
  4. Step 4: Simplify right side
    11,461.70x = 110,503,712.19
  5. Step 5: Solve for x
    x = 110,503,712.19/11,461.70
  6. Step 6: Final answer
    x = 9,641.13

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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.