Home / 21,125.57-31,719.50-11,783.84

Finding the Fourth Proportional to 21,125.57, 31,719.50 and 11,783.84

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Solution

The fourth proportional to 21,125.57, 31,719.50 and 11,783.84 is: 17,693.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.57 : 31,719.50 = 11,783.84 : x
  2. Step 2: Convert to fraction form
    21,125.57/31,719.50 = 11,783.84/x
  3. Step 3: Cross multiply
    21,125.57x = 31,719.50 × 11,783.84
  4. Step 4: Simplify right side
    21,125.57x = 373,777,295.36
  5. Step 5: Solve for x
    x = 373,777,295.36/21,125.57
  6. Step 6: Final answer
    x = 17,693.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.