Home / 21,430.20-32,145.30-16,509.45

Finding the Fourth Proportional to 21,430.20, 32,145.30 and 16,509.45

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Solution

The fourth proportional to 21,430.20, 32,145.30 and 16,509.45 is: 24,764.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.20 : 32,145.30 = 16,509.45 : x
  2. Step 2: Convert to fraction form
    21,430.20/32,145.30 = 16,509.45/x
  3. Step 3: Cross multiply
    21,430.20x = 32,145.30 × 16,509.45
  4. Step 4: Simplify right side
    21,430.20x = 530,701,223.09
  5. Step 5: Solve for x
    x = 530,701,223.09/21,430.20
  6. Step 6: Final answer
    x = 24,764.18

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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.