Home / 6,895.12-9,515-3,870.56

Finding the Fourth Proportional to 6,895.12, 9,515 and 3,870.56

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Solution

The fourth proportional to 6,895.12, 9,515 and 3,870.56 is: 5,341.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,895.12 : 9,515 = 3,870.56 : x
  2. Step 2: Convert to fraction form
    6,895.12/9,515 = 3,870.56/x
  3. Step 3: Cross multiply
    6,895.12x = 9,515 × 3,870.56
  4. Step 4: Simplify right side
    6,895.12x = 36,828,378.40
  5. Step 5: Solve for x
    x = 36,828,378.40/6,895.12
  6. Step 6: Final answer
    x = 5,341.22

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Half scale
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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.