Home / 21,868.39-30,175.36-12,308.77

Finding the Fourth Proportional to 21,868.39, 30,175.36 and 12,308.77

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Solution

The fourth proportional to 21,868.39, 30,175.36 and 12,308.77 is: 16,984.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.39 : 30,175.36 = 12,308.77 : x
  2. Step 2: Convert to fraction form
    21,868.39/30,175.36 = 12,308.77/x
  3. Step 3: Cross multiply
    21,868.39x = 30,175.36 × 12,308.77
  4. Step 4: Simplify right side
    21,868.39x = 371,421,565.91
  5. Step 5: Solve for x
    x = 371,421,565.91/21,868.39
  6. Step 6: Final answer
    x = 16,984.40

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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.