Home / 13,590.78-18,752.28-13,142.79

Finding the Fourth Proportional to 13,590.78, 18,752.28 and 13,142.79

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Solution

The fourth proportional to 13,590.78, 18,752.28 and 13,142.79 is: 18,134.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,590.78 : 18,752.28 = 13,142.79 : x
  2. Step 2: Convert to fraction form
    13,590.78/18,752.28 = 13,142.79/x
  3. Step 3: Cross multiply
    13,590.78x = 18,752.28 × 13,142.79
  4. Step 4: Simplify right side
    13,590.78x = 246,457,278.06
  5. Step 5: Solve for x
    x = 246,457,278.06/13,590.78
  6. Step 6: Final answer
    x = 18,134.15

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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.