Home / 20,986.89-29,000.52-15,312.03

Finding the Fourth Proportional to 20,986.89, 29,000.52 and 15,312.03

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Solution

The fourth proportional to 20,986.89, 29,000.52 and 15,312.03 is: 21,158.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.89 : 29,000.52 = 15,312.03 : x
  2. Step 2: Convert to fraction form
    20,986.89/29,000.52 = 15,312.03/x
  3. Step 3: Cross multiply
    20,986.89x = 29,000.52 × 15,312.03
  4. Step 4: Simplify right side
    20,986.89x = 444,056,755.70
  5. Step 5: Solve for x
    x = 444,056,755.70/20,986.89
  6. Step 6: Final answer
    x = 21,158.77

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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.