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Finding the Fourth Proportional to 13,345.62, 18,417.18 and 7,756.62

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Solution

The fourth proportional to 13,345.62, 18,417.18 and 7,756.62 is: 10,704.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.62 : 18,417.18 = 7,756.62 : x
  2. Step 2: Convert to fraction form
    13,345.62/18,417.18 = 7,756.62/x
  3. Step 3: Cross multiply
    13,345.62x = 18,417.18 × 7,756.62
  4. Step 4: Simplify right side
    13,345.62x = 142,855,066.73
  5. Step 5: Solve for x
    x = 142,855,066.73/13,345.62
  6. Step 6: Final answer
    x = 10,704.27

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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.