Home / 31,004.86-42,714.38-21,557.02

Finding the Fourth Proportional to 31,004.86, 42,714.38 and 21,557.02

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Solution

The fourth proportional to 31,004.86, 42,714.38 and 21,557.02 is: 29,698.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,004.86 : 42,714.38 = 21,557.02 : x
  2. Step 2: Convert to fraction form
    31,004.86/42,714.38 = 21,557.02/x
  3. Step 3: Cross multiply
    31,004.86x = 42,714.38 × 21,557.02
  4. Step 4: Simplify right side
    31,004.86x = 920,794,743.95
  5. Step 5: Solve for x
    x = 920,794,743.95/31,004.86
  6. Step 6: Final answer
    x = 29,698.40

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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.