Home / 21,321.80-29,423.76-12,370.84

Finding the Fourth Proportional to 21,321.80, 29,423.76 and 12,370.84

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Solution

The fourth proportional to 21,321.80, 29,423.76 and 12,370.84 is: 17,071.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.80 : 29,423.76 = 12,370.84 : x
  2. Step 2: Convert to fraction form
    21,321.80/29,423.76 = 12,370.84/x
  3. Step 3: Cross multiply
    21,321.80x = 29,423.76 × 12,370.84
  4. Step 4: Simplify right side
    21,321.80x = 363,996,672.72
  5. Step 5: Solve for x
    x = 363,996,672.72/21,321.80
  6. Step 6: Final answer
    x = 17,071.57

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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.