Home / 21,868.80-30,176.64-12,435.84

Finding the Fourth Proportional to 21,868.80, 30,176.64 and 12,435.84

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Solution

The fourth proportional to 21,868.80, 30,176.64 and 12,435.84 is: 17,160.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.80 : 30,176.64 = 12,435.84 : x
  2. Step 2: Convert to fraction form
    21,868.80/30,176.64 = 12,435.84/x
  3. Step 3: Cross multiply
    21,868.80x = 30,176.64 × 12,435.84
  4. Step 4: Simplify right side
    21,868.80x = 375,271,866.78
  5. Step 5: Solve for x
    x = 375,271,866.78/21,868.80
  6. Step 6: Final answer
    x = 17,160.15

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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.