Home / 21,155.32-29,160.66-16,671.88

Finding the Fourth Proportional to 21,155.32, 29,160.66 and 16,671.88

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Solution

The fourth proportional to 21,155.32, 29,160.66 and 16,671.88 is: 22,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.32 : 29,160.66 = 16,671.88 : x
  2. Step 2: Convert to fraction form
    21,155.32/29,160.66 = 16,671.88/x
  3. Step 3: Cross multiply
    21,155.32x = 29,160.66 × 16,671.88
  4. Step 4: Simplify right side
    21,155.32x = 486,163,024.24
  5. Step 5: Solve for x
    x = 486,163,024.24/21,155.32
  6. Step 6: Final answer
    x = 22,980.65

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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.