Home / 7,864.08-10,840.56-6,464.40

Finding the Fourth Proportional to 7,864.08, 10,840.56 and 6,464.40

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Solution

The fourth proportional to 7,864.08, 10,840.56 and 6,464.40 is: 8,911.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,864.08 : 10,840.56 = 6,464.40 : x
  2. Step 2: Convert to fraction form
    7,864.08/10,840.56 = 6,464.40/x
  3. Step 3: Cross multiply
    7,864.08x = 10,840.56 × 6,464.40
  4. Step 4: Simplify right side
    7,864.08x = 70,077,716.06
  5. Step 5: Solve for x
    x = 70,077,716.06/7,864.08
  6. Step 6: Final answer
    x = 8,911.11

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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.