Home / 21,225.58-29,274.86-15,558.20

Finding the Fourth Proportional to 21,225.58, 29,274.86 and 15,558.20

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Solution

The fourth proportional to 21,225.58, 29,274.86 and 15,558.20 is: 21,458.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.58 : 29,274.86 = 15,558.20 : x
  2. Step 2: Convert to fraction form
    21,225.58/29,274.86 = 15,558.20/x
  3. Step 3: Cross multiply
    21,225.58x = 29,274.86 × 15,558.20
  4. Step 4: Simplify right side
    21,225.58x = 455,464,126.85
  5. Step 5: Solve for x
    x = 455,464,126.85/21,225.58
  6. Step 6: Final answer
    x = 21,458.27

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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.