Home / 39,774.12-54,889.70-21,870.50

Finding the Fourth Proportional to 39,774.12, 54,889.70 and 21,870.50

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Solution

The fourth proportional to 39,774.12, 54,889.70 and 21,870.50 is: 30,182.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,774.12 : 54,889.70 = 21,870.50 : x
  2. Step 2: Convert to fraction form
    39,774.12/54,889.70 = 21,870.50/x
  3. Step 3: Cross multiply
    39,774.12x = 54,889.70 × 21,870.50
  4. Step 4: Simplify right side
    39,774.12x = 1,200,464,800.05
  5. Step 5: Solve for x
    x = 1,200,464,800.05/39,774.12
  6. Step 6: Final answer
    x = 30,182.06

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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.