Home / 15,739.71-21,719.30-12,762.75

Finding the Fourth Proportional to 15,739.71, 21,719.30 and 12,762.75

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Solution

The fourth proportional to 15,739.71, 21,719.30 and 12,762.75 is: 17,611.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.71 : 21,719.30 = 12,762.75 : x
  2. Step 2: Convert to fraction form
    15,739.71/21,719.30 = 12,762.75/x
  3. Step 3: Cross multiply
    15,739.71x = 21,719.30 × 12,762.75
  4. Step 4: Simplify right side
    15,739.71x = 277,197,996.08
  5. Step 5: Solve for x
    x = 277,197,996.08/15,739.71
  6. Step 6: Final answer
    x = 17,611.38

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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.