Home / 15,739.83-21,700.85-12,896.73

Finding the Fourth Proportional to 15,739.83, 21,700.85 and 12,896.73

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Solution

The fourth proportional to 15,739.83, 21,700.85 and 12,896.73 is: 17,781.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.83 : 21,700.85 = 12,896.73 : x
  2. Step 2: Convert to fraction form
    15,739.83/21,700.85 = 12,896.73/x
  3. Step 3: Cross multiply
    15,739.83x = 21,700.85 × 12,896.73
  4. Step 4: Simplify right side
    15,739.83x = 279,869,938.74
  5. Step 5: Solve for x
    x = 279,869,938.74/15,739.83
  6. Step 6: Final answer
    x = 17,781.00

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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.