Home / 21,118.56-31,688.64-14,103.36

Finding the Fourth Proportional to 21,118.56, 31,688.64 and 14,103.36

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Solution

The fourth proportional to 21,118.56, 31,688.64 and 14,103.36 is: 21,162.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.56 : 31,688.64 = 14,103.36 : x
  2. Step 2: Convert to fraction form
    21,118.56/31,688.64 = 14,103.36/x
  3. Step 3: Cross multiply
    21,118.56x = 31,688.64 × 14,103.36
  4. Step 4: Simplify right side
    21,118.56x = 446,916,297.83
  5. Step 5: Solve for x
    x = 446,916,297.83/21,118.56
  6. Step 6: Final answer
    x = 21,162.25

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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.