Home / 10,139.67-13,989.65-8,015.58

Finding the Fourth Proportional to 10,139.67, 13,989.65 and 8,015.58

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Solution

The fourth proportional to 10,139.67, 13,989.65 and 8,015.58 is: 11,059.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,139.67 : 13,989.65 = 8,015.58 : x
  2. Step 2: Convert to fraction form
    10,139.67/13,989.65 = 8,015.58/x
  3. Step 3: Cross multiply
    10,139.67x = 13,989.65 × 8,015.58
  4. Step 4: Simplify right side
    10,139.67x = 112,135,118.67
  5. Step 5: Solve for x
    x = 112,135,118.67/10,139.67
  6. Step 6: Final answer
    x = 11,059.05

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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.