Home / 21,432.80-29,576.40-12,480.56

Finding the Fourth Proportional to 21,432.80, 29,576.40 and 12,480.56

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Solution

The fourth proportional to 21,432.80, 29,576.40 and 12,480.56 is: 17,222.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,432.80 : 29,576.40 = 12,480.56 : x
  2. Step 2: Convert to fraction form
    21,432.80/29,576.40 = 12,480.56/x
  3. Step 3: Cross multiply
    21,432.80x = 29,576.40 × 12,480.56
  4. Step 4: Simplify right side
    21,432.80x = 369,130,034.78
  5. Step 5: Solve for x
    x = 369,130,034.78/21,432.80
  6. Step 6: Final answer
    x = 17,222.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.