Home / 51,986.32-77,979.48-12,543.40

Finding the Fourth Proportional to 51,986.32, 77,979.48 and 12,543.40

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Solution

The fourth proportional to 51,986.32, 77,979.48 and 12,543.40 is: 18,815.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,986.32 : 77,979.48 = 12,543.40 : x
  2. Step 2: Convert to fraction form
    51,986.32/77,979.48 = 12,543.40/x
  3. Step 3: Cross multiply
    51,986.32x = 77,979.48 × 12,543.40
  4. Step 4: Simplify right side
    51,986.32x = 978,127,809.43
  5. Step 5: Solve for x
    x = 978,127,809.43/51,986.32
  6. Step 6: Final answer
    x = 18,815.10

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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.