Home / 15,111.42-20,830.32-12,872.58

Finding the Fourth Proportional to 15,111.42, 20,830.32 and 12,872.58

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Solution

The fourth proportional to 15,111.42, 20,830.32 and 12,872.58 is: 17,744.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.42 : 20,830.32 = 12,872.58 : x
  2. Step 2: Convert to fraction form
    15,111.42/20,830.32 = 12,872.58/x
  3. Step 3: Cross multiply
    15,111.42x = 20,830.32 × 12,872.58
  4. Step 4: Simplify right side
    15,111.42x = 268,139,960.63
  5. Step 5: Solve for x
    x = 268,139,960.63/15,111.42
  6. Step 6: Final answer
    x = 17,744.19

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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.