Home / 21,439.80-32,120.76-20,973.24

Finding the Fourth Proportional to 21,439.80, 32,120.76 and 20,973.24

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Solution

The fourth proportional to 21,439.80, 32,120.76 and 20,973.24 is: 31,421.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.80 : 32,120.76 = 20,973.24 : x
  2. Step 2: Convert to fraction form
    21,439.80/32,120.76 = 20,973.24/x
  3. Step 3: Cross multiply
    21,439.80x = 32,120.76 × 20,973.24
  4. Step 4: Simplify right side
    21,439.80x = 673,676,408.46
  5. Step 5: Solve for x
    x = 673,676,408.46/21,439.80
  6. Step 6: Final answer
    x = 31,421.77

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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.