Home / 19,830.80-27,375.30-12,670.13

Finding the Fourth Proportional to 19,830.80, 27,375.30 and 12,670.13

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Solution

The fourth proportional to 19,830.80, 27,375.30 and 12,670.13 is: 17,490.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,830.80 : 27,375.30 = 12,670.13 : x
  2. Step 2: Convert to fraction form
    19,830.80/27,375.30 = 12,670.13/x
  3. Step 3: Cross multiply
    19,830.80x = 27,375.30 × 12,670.13
  4. Step 4: Simplify right side
    19,830.80x = 346,848,678.23
  5. Step 5: Solve for x
    x = 346,848,678.23/19,830.80
  6. Step 6: Final answer
    x = 17,490.40

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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.