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Finding the Fourth Proportional to 7,767.72, 10,720.08 and 4,784.58

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Solution

The fourth proportional to 7,767.72, 10,720.08 and 4,784.58 is: 6,603.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,767.72 : 10,720.08 = 4,784.58 : x
  2. Step 2: Convert to fraction form
    7,767.72/10,720.08 = 4,784.58/x
  3. Step 3: Cross multiply
    7,767.72x = 10,720.08 × 4,784.58
  4. Step 4: Simplify right side
    7,767.72x = 51,291,080.37
  5. Step 5: Solve for x
    x = 51,291,080.37/7,767.72
  6. Step 6: Final answer
    x = 6,603.11

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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.