Home / 51,939.88-77,878.61-20,312.22

Finding the Fourth Proportional to 51,939.88, 77,878.61 and 20,312.22

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Solution

The fourth proportional to 51,939.88, 77,878.61 and 20,312.22 is: 30,456.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,939.88 : 77,878.61 = 20,312.22 : x
  2. Step 2: Convert to fraction form
    51,939.88/77,878.61 = 20,312.22/x
  3. Step 3: Cross multiply
    51,939.88x = 77,878.61 × 20,312.22
  4. Step 4: Simplify right side
    51,939.88x = 1,581,887,402.46
  5. Step 5: Solve for x
    x = 1,581,887,402.46/51,939.88
  6. Step 6: Final answer
    x = 30,456.12

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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.