Home / 51,965.81-77,979.47-21,978.36

Finding the Fourth Proportional to 51,965.81, 77,979.47 and 21,978.36

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Solution

The fourth proportional to 51,965.81, 77,979.47 and 21,978.36 is: 32,980.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,965.81 : 77,979.47 = 21,978.36 : x
  2. Step 2: Convert to fraction form
    51,965.81/77,979.47 = 21,978.36/x
  3. Step 3: Cross multiply
    51,965.81x = 77,979.47 × 21,978.36
  4. Step 4: Simplify right side
    51,965.81x = 1,713,860,864.27
  5. Step 5: Solve for x
    x = 1,713,860,864.27/51,965.81
  6. Step 6: Final answer
    x = 32,980.55

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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.