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Finding the Fourth Proportional to 7,005.66, 9,668.15 and 4,172.40

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Solution

The fourth proportional to 7,005.66, 9,668.15 and 4,172.40 is: 5,758.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,005.66 : 9,668.15 = 4,172.40 : x
  2. Step 2: Convert to fraction form
    7,005.66/9,668.15 = 4,172.40/x
  3. Step 3: Cross multiply
    7,005.66x = 9,668.15 × 4,172.40
  4. Step 4: Simplify right side
    7,005.66x = 40,339,368.20
  5. Step 5: Solve for x
    x = 40,339,368.20/7,005.66
  6. Step 6: Final answer
    x = 5,758.11

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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.