Home / 20,916.28-31,189.91-18,013.24

Finding the Fourth Proportional to 20,916.28, 31,189.91 and 18,013.24

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Solution

The fourth proportional to 20,916.28, 31,189.91 and 18,013.24 is: 26,860.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.28 : 31,189.91 = 18,013.24 : x
  2. Step 2: Convert to fraction form
    20,916.28/31,189.91 = 18,013.24/x
  3. Step 3: Cross multiply
    20,916.28x = 31,189.91 × 18,013.24
  4. Step 4: Simplify right side
    20,916.28x = 561,831,334.41
  5. Step 5: Solve for x
    x = 561,831,334.41/20,916.28
  6. Step 6: Final answer
    x = 26,860.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.