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Finding the Fourth Proportional to 6,655.40, 9,972.30 and 4,185.80

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Solution

The fourth proportional to 6,655.40, 9,972.30 and 4,185.80 is: 6,271.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,655.40 : 9,972.30 = 4,185.80 : x
  2. Step 2: Convert to fraction form
    6,655.40/9,972.30 = 4,185.80/x
  3. Step 3: Cross multiply
    6,655.40x = 9,972.30 × 4,185.80
  4. Step 4: Simplify right side
    6,655.40x = 41,742,053.34
  5. Step 5: Solve for x
    x = 41,742,053.34/6,655.40
  6. Step 6: Final answer
    x = 6,271.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.