Home / 18,278.40-27,389.12-12,743.04

Finding the Fourth Proportional to 18,278.40, 27,389.12 and 12,743.04

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Solution

The fourth proportional to 18,278.40, 27,389.12 and 12,743.04 is: 19,094.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.40 : 27,389.12 = 12,743.04 : x
  2. Step 2: Convert to fraction form
    18,278.40/27,389.12 = 12,743.04/x
  3. Step 3: Cross multiply
    18,278.40x = 27,389.12 × 12,743.04
  4. Step 4: Simplify right side
    18,278.40x = 349,020,651.72
  5. Step 5: Solve for x
    x = 349,020,651.72/18,278.40
  6. Step 6: Final answer
    x = 19,094.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.