Home / 21,890.36-32,782.88-12,501.92

Finding the Fourth Proportional to 21,890.36, 32,782.88 and 12,501.92

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Solution

The fourth proportional to 21,890.36, 32,782.88 and 12,501.92 is: 18,722.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.36 : 32,782.88 = 12,501.92 : x
  2. Step 2: Convert to fraction form
    21,890.36/32,782.88 = 12,501.92/x
  3. Step 3: Cross multiply
    21,890.36x = 32,782.88 × 12,501.92
  4. Step 4: Simplify right side
    21,890.36x = 409,849,056.34
  5. Step 5: Solve for x
    x = 409,849,056.34/21,890.36
  6. Step 6: Final answer
    x = 18,722.81

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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.