Home / 21,724.40-29,977.88-12,772.28

Finding the Fourth Proportional to 21,724.40, 29,977.88 and 12,772.28

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Solution

The fourth proportional to 21,724.40, 29,977.88 and 12,772.28 is: 17,624.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,724.40 : 29,977.88 = 12,772.28 : x
  2. Step 2: Convert to fraction form
    21,724.40/29,977.88 = 12,772.28/x
  3. Step 3: Cross multiply
    21,724.40x = 29,977.88 × 12,772.28
  4. Step 4: Simplify right side
    21,724.40x = 382,885,877.17
  5. Step 5: Solve for x
    x = 382,885,877.17/21,724.40
  6. Step 6: Final answer
    x = 17,624.69

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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.