Home / 19,881.10-27,421.63-12,800.76

Finding the Fourth Proportional to 19,881.10, 27,421.63 and 12,800.76

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Solution

The fourth proportional to 19,881.10, 27,421.63 and 12,800.76 is: 17,655.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.10 : 27,421.63 = 12,800.76 : x
  2. Step 2: Convert to fraction form
    19,881.10/27,421.63 = 12,800.76/x
  3. Step 3: Cross multiply
    19,881.10x = 27,421.63 × 12,800.76
  4. Step 4: Simplify right side
    19,881.10x = 351,017,704.44
  5. Step 5: Solve for x
    x = 351,017,704.44/19,881.10
  6. Step 6: Final answer
    x = 17,655.85

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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.