Home / 15,555.22-21,451.76-10,240.81

Finding the Fourth Proportional to 15,555.22, 21,451.76 and 10,240.81

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Solution

The fourth proportional to 15,555.22, 21,451.76 and 10,240.81 is: 14,122.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,555.22 : 21,451.76 = 10,240.81 : x
  2. Step 2: Convert to fraction form
    15,555.22/21,451.76 = 10,240.81/x
  3. Step 3: Cross multiply
    15,555.22x = 21,451.76 × 10,240.81
  4. Step 4: Simplify right side
    15,555.22x = 219,683,398.33
  5. Step 5: Solve for x
    x = 219,683,398.33/15,555.22
  6. Step 6: Final answer
    x = 14,122.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.