Home / 39,782.12-54,897.84-21,876.06

Finding the Fourth Proportional to 39,782.12, 54,897.84 and 21,876.06

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Solution

The fourth proportional to 39,782.12, 54,897.84 and 21,876.06 is: 30,188.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,782.12 : 54,897.84 = 21,876.06 : x
  2. Step 2: Convert to fraction form
    39,782.12/54,897.84 = 21,876.06/x
  3. Step 3: Cross multiply
    39,782.12x = 54,897.84 × 21,876.06
  4. Step 4: Simplify right side
    39,782.12x = 1,200,948,441.71
  5. Step 5: Solve for x
    x = 1,200,948,441.71/39,782.12
  6. Step 6: Final answer
    x = 30,188.15

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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.