Home / 21,008.80-28,991.28-13,444.48

Finding the Fourth Proportional to 21,008.80, 28,991.28 and 13,444.48

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Solution

The fourth proportional to 21,008.80, 28,991.28 and 13,444.48 is: 18,552.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.80 : 28,991.28 = 13,444.48 : x
  2. Step 2: Convert to fraction form
    21,008.80/28,991.28 = 13,444.48/x
  3. Step 3: Cross multiply
    21,008.80x = 28,991.28 × 13,444.48
  4. Step 4: Simplify right side
    21,008.80x = 389,772,684.13
  5. Step 5: Solve for x
    x = 389,772,684.13/21,008.80
  6. Step 6: Final answer
    x = 18,552.83

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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.