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Finding the Fourth Proportional to 6,639.04, 9,158.40 and 5,064.40

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Solution

The fourth proportional to 6,639.04, 9,158.40 and 5,064.40 is: 6,986.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.04 : 9,158.40 = 5,064.40 : x
  2. Step 2: Convert to fraction form
    6,639.04/9,158.40 = 5,064.40/x
  3. Step 3: Cross multiply
    6,639.04x = 9,158.40 × 5,064.40
  4. Step 4: Simplify right side
    6,639.04x = 46,381,800.96
  5. Step 5: Solve for x
    x = 46,381,800.96/6,639.04
  6. Step 6: Final answer
    x = 6,986.22

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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.