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Finding the Fourth Proportional to 7,840.32, 10,820.64 and 4,528.32

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Solution

The fourth proportional to 7,840.32, 10,820.64 and 4,528.32 is: 6,249.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,840.32 : 10,820.64 = 4,528.32 : x
  2. Step 2: Convert to fraction form
    7,840.32/10,820.64 = 4,528.32/x
  3. Step 3: Cross multiply
    7,840.32x = 10,820.64 × 4,528.32
  4. Step 4: Simplify right side
    7,840.32x = 48,999,320.52
  5. Step 5: Solve for x
    x = 48,999,320.52/7,840.32
  6. Step 6: Final answer
    x = 6,249.66

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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.