Home / 20,639.30-30,958.95-19,587.50

Finding the Fourth Proportional to 20,639.30, 30,958.95 and 19,587.50

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Solution

The fourth proportional to 20,639.30, 30,958.95 and 19,587.50 is: 29,381.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.30 : 30,958.95 = 19,587.50 : x
  2. Step 2: Convert to fraction form
    20,639.30/30,958.95 = 19,587.50/x
  3. Step 3: Cross multiply
    20,639.30x = 30,958.95 × 19,587.50
  4. Step 4: Simplify right side
    20,639.30x = 606,408,278.33
  5. Step 5: Solve for x
    x = 606,408,278.33/20,639.30
  6. Step 6: Final answer
    x = 29,381.24

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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.