Home / 21,140.70-31,688.16-13,750.44

Finding the Fourth Proportional to 21,140.70, 31,688.16 and 13,750.44

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Solution

The fourth proportional to 21,140.70, 31,688.16 and 13,750.44 is: 20,610.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.70 : 31,688.16 = 13,750.44 : x
  2. Step 2: Convert to fraction form
    21,140.70/31,688.16 = 13,750.44/x
  3. Step 3: Cross multiply
    21,140.70x = 31,688.16 × 13,750.44
  4. Step 4: Simplify right side
    21,140.70x = 435,726,142.79
  5. Step 5: Solve for x
    x = 435,726,142.79/21,140.70
  6. Step 6: Final answer
    x = 20,610.77

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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.