Home / 10,345.75-15,518.65-6,857.90

Finding the Fourth Proportional to 10,345.75, 15,518.65 and 6,857.90

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Solution

The fourth proportional to 10,345.75, 15,518.65 and 6,857.90 is: 10,286.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,345.75 : 15,518.65 = 6,857.90 : x
  2. Step 2: Convert to fraction form
    10,345.75/15,518.65 = 6,857.90/x
  3. Step 3: Cross multiply
    10,345.75x = 15,518.65 × 6,857.90
  4. Step 4: Simplify right side
    10,345.75x = 106,425,349.84
  5. Step 5: Solve for x
    x = 106,425,349.84/10,345.75
  6. Step 6: Final answer
    x = 10,286.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.