Home / 13,989.89-19,305.47-8,021.21

Finding the Fourth Proportional to 13,989.89, 19,305.47 and 8,021.21

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Solution

The fourth proportional to 13,989.89, 19,305.47 and 8,021.21 is: 11,068.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.89 : 19,305.47 = 8,021.21 : x
  2. Step 2: Convert to fraction form
    13,989.89/19,305.47 = 8,021.21/x
  3. Step 3: Cross multiply
    13,989.89x = 19,305.47 × 8,021.21
  4. Step 4: Simplify right side
    13,989.89x = 154,853,152.54
  5. Step 5: Solve for x
    x = 154,853,152.54/13,989.89
  6. Step 6: Final answer
    x = 11,068.93

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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.