Home / 21,800.10-30,087.51-12,850.50

Finding the Fourth Proportional to 21,800.10, 30,087.51 and 12,850.50

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Solution

The fourth proportional to 21,800.10, 30,087.51 and 12,850.50 is: 17,735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,800.10 : 30,087.51 = 12,850.50 : x
  2. Step 2: Convert to fraction form
    21,800.10/30,087.51 = 12,850.50/x
  3. Step 3: Cross multiply
    21,800.10x = 30,087.51 × 12,850.50
  4. Step 4: Simplify right side
    21,800.10x = 386,639,547.26
  5. Step 5: Solve for x
    x = 386,639,547.26/21,800.10
  6. Step 6: Final answer
    x = 17,735.68

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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.