Home / 10,129.45-13,985.15-6,357.79

Finding the Fourth Proportional to 10,129.45, 13,985.15 and 6,357.79

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Solution

The fourth proportional to 10,129.45, 13,985.15 and 6,357.79 is: 8,777.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,129.45 : 13,985.15 = 6,357.79 : x
  2. Step 2: Convert to fraction form
    10,129.45/13,985.15 = 6,357.79/x
  3. Step 3: Cross multiply
    10,129.45x = 13,985.15 × 6,357.79
  4. Step 4: Simplify right side
    10,129.45x = 88,914,646.82
  5. Step 5: Solve for x
    x = 88,914,646.82/10,129.45
  6. Step 6: Final answer
    x = 8,777.84

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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.