Home / 21,510.86-29,686.57-12,556.44

Finding the Fourth Proportional to 21,510.86, 29,686.57 and 12,556.44

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Solution

The fourth proportional to 21,510.86, 29,686.57 and 12,556.44 is: 17,328.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,510.86 : 29,686.57 = 12,556.44 : x
  2. Step 2: Convert to fraction form
    21,510.86/29,686.57 = 12,556.44/x
  3. Step 3: Cross multiply
    21,510.86x = 29,686.57 × 12,556.44
  4. Step 4: Simplify right side
    21,510.86x = 372,757,603.62
  5. Step 5: Solve for x
    x = 372,757,603.62/21,510.86
  6. Step 6: Final answer
    x = 17,328.81

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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.