Home / 21,705.90-32,472.45-18,816.30

Finding the Fourth Proportional to 21,705.90, 32,472.45 and 18,816.30

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Solution

The fourth proportional to 21,705.90, 32,472.45 and 18,816.30 is: 28,149.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.90 : 32,472.45 = 18,816.30 : x
  2. Step 2: Convert to fraction form
    21,705.90/32,472.45 = 18,816.30/x
  3. Step 3: Cross multiply
    21,705.90x = 32,472.45 × 18,816.30
  4. Step 4: Simplify right side
    21,705.90x = 611,011,360.94
  5. Step 5: Solve for x
    x = 611,011,360.94/21,705.90
  6. Step 6: Final answer
    x = 28,149.55

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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.