Home / 15,700.88-21,670.94-8,990.37

Finding the Fourth Proportional to 15,700.88, 21,670.94 and 8,990.37

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Solution

The fourth proportional to 15,700.88, 21,670.94 and 8,990.37 is: 12,408.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,700.88 : 21,670.94 = 8,990.37 : x
  2. Step 2: Convert to fraction form
    15,700.88/21,670.94 = 8,990.37/x
  3. Step 3: Cross multiply
    15,700.88x = 21,670.94 × 8,990.37
  4. Step 4: Simplify right side
    15,700.88x = 194,829,768.85
  5. Step 5: Solve for x
    x = 194,829,768.85/15,700.88
  6. Step 6: Final answer
    x = 12,408.84

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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.