Home / 39,759.94-54,870.15-21,856.30

Finding the Fourth Proportional to 39,759.94, 54,870.15 and 21,856.30

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Solution

The fourth proportional to 39,759.94, 54,870.15 and 21,856.30 is: 30,162.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,759.94 : 54,870.15 = 21,856.30 : x
  2. Step 2: Convert to fraction form
    39,759.94/54,870.15 = 21,856.30/x
  3. Step 3: Cross multiply
    39,759.94x = 54,870.15 × 21,856.30
  4. Step 4: Simplify right side
    39,759.94x = 1,199,258,459.45
  5. Step 5: Solve for x
    x = 1,199,258,459.45/39,759.94
  6. Step 6: Final answer
    x = 30,162.48

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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.