Home / 10,869.12-14,998.34-8,636.40

Finding the Fourth Proportional to 10,869.12, 14,998.34 and 8,636.40

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Solution

The fourth proportional to 10,869.12, 14,998.34 and 8,636.40 is: 11,917.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,869.12 : 14,998.34 = 8,636.40 : x
  2. Step 2: Convert to fraction form
    10,869.12/14,998.34 = 8,636.40/x
  3. Step 3: Cross multiply
    10,869.12x = 14,998.34 × 8,636.40
  4. Step 4: Simplify right side
    10,869.12x = 129,531,663.58
  5. Step 5: Solve for x
    x = 129,531,663.58/10,869.12
  6. Step 6: Final answer
    x = 11,917.40

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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.