Home / 21,750.36-30,015-12,795.90

Finding the Fourth Proportional to 21,750.36, 30,015 and 12,795.90

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Solution

The fourth proportional to 21,750.36, 30,015 and 12,795.90 is: 17,658.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.36 : 30,015 = 12,795.90 : x
  2. Step 2: Convert to fraction form
    21,750.36/30,015 = 12,795.90/x
  3. Step 3: Cross multiply
    21,750.36x = 30,015 × 12,795.90
  4. Step 4: Simplify right side
    21,750.36x = 384,068,938.50
  5. Step 5: Solve for x
    x = 384,068,938.50/21,750.36
  6. Step 6: Final answer
    x = 17,658.05

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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.