Home / 6,875.20-9,488-3,890.98

Finding the Fourth Proportional to 6,875.20, 9,488 and 3,890.98

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Solution

The fourth proportional to 6,875.20, 9,488 and 3,890.98 is: 5,369.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,875.20 : 9,488 = 3,890.98 : x
  2. Step 2: Convert to fraction form
    6,875.20/9,488 = 3,890.98/x
  3. Step 3: Cross multiply
    6,875.20x = 9,488 × 3,890.98
  4. Step 4: Simplify right side
    6,875.20x = 36,917,618.24
  5. Step 5: Solve for x
    x = 36,917,618.24/6,875.20
  6. Step 6: Final answer
    x = 5,369.68

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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.