Home / 7,815.32-10,776.81-6,388.34

Finding the Fourth Proportional to 7,815.32, 10,776.81 and 6,388.34

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Solution

The fourth proportional to 7,815.32, 10,776.81 and 6,388.34 is: 8,809.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.32 : 10,776.81 = 6,388.34 : x
  2. Step 2: Convert to fraction form
    7,815.32/10,776.81 = 6,388.34/x
  3. Step 3: Cross multiply
    7,815.32x = 10,776.81 × 6,388.34
  4. Step 4: Simplify right side
    7,815.32x = 68,845,926.40
  5. Step 5: Solve for x
    x = 68,845,926.40/7,815.32
  6. Step 6: Final answer
    x = 8,809.10

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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.