Home / 13,569.88-18,723.90-7,978.84

Finding the Fourth Proportional to 13,569.88, 18,723.90 and 7,978.84

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Solution

The fourth proportional to 13,569.88, 18,723.90 and 7,978.84 is: 11,009.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,569.88 : 18,723.90 = 7,978.84 : x
  2. Step 2: Convert to fraction form
    13,569.88/18,723.90 = 7,978.84/x
  3. Step 3: Cross multiply
    13,569.88x = 18,723.90 × 7,978.84
  4. Step 4: Simplify right side
    13,569.88x = 149,395,002.28
  5. Step 5: Solve for x
    x = 149,395,002.28/13,569.88
  6. Step 6: Final answer
    x = 11,009.31

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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.