Home / 21,157.20-29,187.12-14,873.28

Finding the Fourth Proportional to 21,157.20, 29,187.12 and 14,873.28

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Solution

The fourth proportional to 21,157.20, 29,187.12 and 14,873.28 is: 20,518.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.20 : 29,187.12 = 14,873.28 : x
  2. Step 2: Convert to fraction form
    21,157.20/29,187.12 = 14,873.28/x
  3. Step 3: Cross multiply
    21,157.20x = 29,187.12 × 14,873.28
  4. Step 4: Simplify right side
    21,157.20x = 434,108,208.15
  5. Step 5: Solve for x
    x = 434,108,208.15/21,157.20
  6. Step 6: Final answer
    x = 20,518.23

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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.