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Finding the Fourth Proportional to 27,120.51, 40,681.71 and 8,398.85

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Solution

The fourth proportional to 27,120.51, 40,681.71 and 8,398.85 is: 12,598.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,120.51 : 40,681.71 = 8,398.85 : x
  2. Step 2: Convert to fraction form
    27,120.51/40,681.71 = 8,398.85/x
  3. Step 3: Cross multiply
    27,120.51x = 40,681.71 × 8,398.85
  4. Step 4: Simplify right side
    27,120.51x = 341,679,376.62
  5. Step 5: Solve for x
    x = 341,679,376.62/27,120.51
  6. Step 6: Final answer
    x = 12,598.56

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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.