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Finding the Fourth Proportional to 27,457.70, 37,890.15 and 15,520.32

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Solution

The fourth proportional to 27,457.70, 37,890.15 and 15,520.32 is: 21,417.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,457.70 : 37,890.15 = 15,520.32 : x
  2. Step 2: Convert to fraction form
    27,457.70/37,890.15 = 15,520.32/x
  3. Step 3: Cross multiply
    27,457.70x = 37,890.15 × 15,520.32
  4. Step 4: Simplify right side
    27,457.70x = 588,067,252.85
  5. Step 5: Solve for x
    x = 588,067,252.85/27,457.70
  6. Step 6: Final answer
    x = 21,417.21

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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.