Home / 15,699.50-21,665.21-9,411.87

Finding the Fourth Proportional to 15,699.50, 21,665.21 and 9,411.87

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Solution

The fourth proportional to 15,699.50, 21,665.21 and 9,411.87 is: 12,988.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.50 : 21,665.21 = 9,411.87 : x
  2. Step 2: Convert to fraction form
    15,699.50/21,665.21 = 9,411.87/x
  3. Step 3: Cross multiply
    15,699.50x = 21,665.21 × 9,411.87
  4. Step 4: Simplify right side
    15,699.50x = 203,910,092.98
  5. Step 5: Solve for x
    x = 203,910,092.98/15,699.50
  6. Step 6: Final answer
    x = 12,988.32

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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.