Home / 20,953.30-31,466.40-11,111.80

Finding the Fourth Proportional to 20,953.30, 31,466.40 and 11,111.80

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Solution

The fourth proportional to 20,953.30, 31,466.40 and 11,111.80 is: 16,687.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.30 : 31,466.40 = 11,111.80 : x
  2. Step 2: Convert to fraction form
    20,953.30/31,466.40 = 11,111.80/x
  3. Step 3: Cross multiply
    20,953.30x = 31,466.40 × 11,111.80
  4. Step 4: Simplify right side
    20,953.30x = 349,648,343.52
  5. Step 5: Solve for x
    x = 349,648,343.52/20,953.30
  6. Step 6: Final answer
    x = 16,687.03

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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.