Home / 21,719.90-29,970.86-12,766.70

Finding the Fourth Proportional to 21,719.90, 29,970.86 and 12,766.70

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Solution

The fourth proportional to 21,719.90, 29,970.86 and 12,766.70 is: 17,616.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.90 : 29,970.86 = 12,766.70 : x
  2. Step 2: Convert to fraction form
    21,719.90/29,970.86 = 12,766.70/x
  3. Step 3: Cross multiply
    21,719.90x = 29,970.86 × 12,766.70
  4. Step 4: Simplify right side
    21,719.90x = 382,628,978.36
  5. Step 5: Solve for x
    x = 382,628,978.36/21,719.90
  6. Step 6: Final answer
    x = 17,616.52

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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.