Home / 12,721.29-18,989.02-11,783.31

Finding the Fourth Proportional to 12,721.29, 18,989.02 and 11,783.31

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Solution

The fourth proportional to 12,721.29, 18,989.02 and 11,783.31 is: 17,588.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.29 : 18,989.02 = 11,783.31 : x
  2. Step 2: Convert to fraction form
    12,721.29/18,989.02 = 11,783.31/x
  3. Step 3: Cross multiply
    12,721.29x = 18,989.02 × 11,783.31
  4. Step 4: Simplify right side
    12,721.29x = 223,753,509.26
  5. Step 5: Solve for x
    x = 223,753,509.26/12,721.29
  6. Step 6: Final answer
    x = 17,588.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.