Home / 21,002.19-31,461.21-12,656.96

Finding the Fourth Proportional to 21,002.19, 31,461.21 and 12,656.96

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Solution

The fourth proportional to 21,002.19, 31,461.21 and 12,656.96 is: 18,960.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.19 : 31,461.21 = 12,656.96 : x
  2. Step 2: Convert to fraction form
    21,002.19/31,461.21 = 12,656.96/x
  3. Step 3: Cross multiply
    21,002.19x = 31,461.21 × 12,656.96
  4. Step 4: Simplify right side
    21,002.19x = 398,203,237.20
  5. Step 5: Solve for x
    x = 398,203,237.20/21,002.19
  6. Step 6: Final answer
    x = 18,960.09

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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.