Home / 21,385.22-29,510.88-15,021.02

Finding the Fourth Proportional to 21,385.22, 29,510.88 and 15,021.02

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Solution

The fourth proportional to 21,385.22, 29,510.88 and 15,021.02 is: 20,728.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.22 : 29,510.88 = 15,021.02 : x
  2. Step 2: Convert to fraction form
    21,385.22/29,510.88 = 15,021.02/x
  3. Step 3: Cross multiply
    21,385.22x = 29,510.88 × 15,021.02
  4. Step 4: Simplify right side
    21,385.22x = 443,283,518.70
  5. Step 5: Solve for x
    x = 443,283,518.70/21,385.22
  6. Step 6: Final answer
    x = 20,728.50

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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.