Home / 21,347.20-32,020.80-10,220

Finding the Fourth Proportional to 21,347.20, 32,020.80 and 10,220

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Solution

The fourth proportional to 21,347.20, 32,020.80 and 10,220 is: 15,330

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,347.20 : 32,020.80 = 10,220 : x
  2. Step 2: Convert to fraction form
    21,347.20/32,020.80 = 10,220/x
  3. Step 3: Cross multiply
    21,347.20x = 32,020.80 × 10,220
  4. Step 4: Simplify right side
    21,347.20x = 327,252,576
  5. Step 5: Solve for x
    x = 327,252,576/21,347.20
  6. Step 6: Final answer
    x = 15,330

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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.