Home / 10,143.32-13,989.87-6,509.72

Finding the Fourth Proportional to 10,143.32, 13,989.87 and 6,509.72

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Solution

The fourth proportional to 10,143.32, 13,989.87 and 6,509.72 is: 8,978.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,143.32 : 13,989.87 = 6,509.72 : x
  2. Step 2: Convert to fraction form
    10,143.32/13,989.87 = 6,509.72/x
  3. Step 3: Cross multiply
    10,143.32x = 13,989.87 × 6,509.72
  4. Step 4: Simplify right side
    10,143.32x = 91,070,066.59
  5. Step 5: Solve for x
    x = 91,070,066.59/10,143.32
  6. Step 6: Final answer
    x = 8,978.33

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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.