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Finding the Fourth Proportional to 6,530.40, 8,999.64 and 6,433.20

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Solution

The fourth proportional to 6,530.40, 8,999.64 and 6,433.20 is: 8,865.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,530.40 : 8,999.64 = 6,433.20 : x
  2. Step 2: Convert to fraction form
    6,530.40/8,999.64 = 6,433.20/x
  3. Step 3: Cross multiply
    6,530.40x = 8,999.64 × 6,433.20
  4. Step 4: Simplify right side
    6,530.40x = 57,896,484.05
  5. Step 5: Solve for x
    x = 57,896,484.05/6,530.40
  6. Step 6: Final answer
    x = 8,865.69

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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.