Home / 20,117.91-27,762.90-12,165.45

Finding the Fourth Proportional to 20,117.91, 27,762.90 and 12,165.45

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Solution

The fourth proportional to 20,117.91, 27,762.90 and 12,165.45 is: 16,788.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,117.91 : 27,762.90 = 12,165.45 : x
  2. Step 2: Convert to fraction form
    20,117.91/27,762.90 = 12,165.45/x
  3. Step 3: Cross multiply
    20,117.91x = 27,762.90 × 12,165.45
  4. Step 4: Simplify right side
    20,117.91x = 337,748,171.81
  5. Step 5: Solve for x
    x = 337,748,171.81/20,117.91
  6. Step 6: Final answer
    x = 16,788.43

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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.