Home / 21,305.02-29,400.86-12,357.72

Finding the Fourth Proportional to 21,305.02, 29,400.86 and 12,357.72

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Solution

The fourth proportional to 21,305.02, 29,400.86 and 12,357.72 is: 17,053.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.02 : 29,400.86 = 12,357.72 : x
  2. Step 2: Convert to fraction form
    21,305.02/29,400.86 = 12,357.72/x
  3. Step 3: Cross multiply
    21,305.02x = 29,400.86 × 12,357.72
  4. Step 4: Simplify right side
    21,305.02x = 363,327,595.64
  5. Step 5: Solve for x
    x = 363,327,595.64/21,305.02
  6. Step 6: Final answer
    x = 17,053.61

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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.