Home / 15,699.72-21,665.67-8,985.46

Finding the Fourth Proportional to 15,699.72, 21,665.67 and 8,985.46

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Solution

The fourth proportional to 15,699.72, 21,665.67 and 8,985.46 is: 12,399.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.72 : 21,665.67 = 8,985.46 : x
  2. Step 2: Convert to fraction form
    15,699.72/21,665.67 = 8,985.46/x
  3. Step 3: Cross multiply
    15,699.72x = 21,665.67 × 8,985.46
  4. Step 4: Simplify right side
    15,699.72x = 194,675,956.99
  5. Step 5: Solve for x
    x = 194,675,956.99/15,699.72
  6. Step 6: Final answer
    x = 12,399.96

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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.