Home / 6,875.61-9,487.89-3,891.75

Finding the Fourth Proportional to 6,875.61, 9,487.89 and 3,891.75

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Solution

The fourth proportional to 6,875.61, 9,487.89 and 3,891.75 is: 5,370.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,875.61 : 9,487.89 = 3,891.75 : x
  2. Step 2: Convert to fraction form
    6,875.61/9,487.89 = 3,891.75/x
  3. Step 3: Cross multiply
    6,875.61x = 9,487.89 × 3,891.75
  4. Step 4: Simplify right side
    6,875.61x = 36,924,495.91
  5. Step 5: Solve for x
    x = 36,924,495.91/6,875.61
  6. Step 6: Final answer
    x = 5,370.36

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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.